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de Graaf, Daan (author)Graph databases are systems to efficiently store and query large graphs. As graph databases grow in popularity, they are used to answer increasingly diverse and complex queries. However, graph databases typically have a very limited query language that cannot express arbitrary algorithms. As a result, many users treat the database as a storage...master thesis 2023
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Schutte, Marcus (author)Today's need for highly available systems leads to data partitioning and replication across multiple nodes. Providing strong transactional consistency in a distributed database requires extensive communication. For this, algorithms such as two phase commit are used. These communication algorithms add extra network latency's. For application...master 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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Qiu, Jingxuan (author)Distributed databases often struggle to fulfill their transactional isolation guarantees due to sharding and replication. As a result, the problem of checking isolation levels is consistently receiving attention from academia and industries. Transactional dependency graphs form a useful abstraction to analyze the transactions’ dependencies and...master thesis 2023
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Mbwanda, Tendai (author)Diversity in the use cases of semantic 3D city models today is unprecedented. A key enabler for this is the CityGML standard developed by the OGC to facilitate storing and exchanging these city models. Nevertheless, CityGML only provides object definitions which cater for a wide range of applications, making necessary the need to attach...master thesis 2023
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Hristov, Tsvetomir (author)Although digital watermarking has been a well-researched topic for the past decades and has seen numerous implementations for relational databases, it still lacks research for non-relational schema-less databases. In this paper, we explore proposed techniques for non-relational database watermarking and introduce an improved technique for NoSQL...bachelor thesis 2023
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Guillou, Nicolas (author), Lavidas, G. (author), Kamranzad, Bahareh (author)Refined numerical wave energy resource assessments are required to reduce uncertainties in the evaluation of available power and energy production. However, to restrict the computational cost, a great part of wave hindcast simulations cover a limited time range (below ten years) or rely on coarse spatial resolutions while routinely ignoring tide...journal article 2023
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Miedema, Daphne (author), Taipalus, Toni (author), Aivaloglou, E.A. (author)Several educational studies have argued for the contextualization of assignments, i.e., for providing a context or a story instead of an abstract or symbolic problem statement. Such contextualization may have beneficial effects such as higher student engagement and lower dropout rates. In the domain of database education, textbooks and...conference paper 2023
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Bugaje, A.-.A.B. (author), Cremer, Jochen (author), Strbac, Goran (author)Machine learning (ML) for real-time security assessment requires a diverse training database to be accurate for scenarios beyond historical records. Generating diverse operating conditions is highly relevant for the uncertain future of emerging power systems that are completely different to historical power systems. In response, for the first...journal article 2023
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Culmone, C. (author), Yikilmaz, Semih Fatih (author), Trauzettel, F. (author), Breedveld, P. (author)Conventional medical instruments are not capable of passing through tortuous anatomy as required for natural orifice transluminal endoscopic surgery due to their rigid shaft designs. Nevertheless, developments in minimally invasive surgery are pushing medical devices to become more dexterous. Amongst devices with controllable flexibility, so...review 2023
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Miranda Xicotencatl, Brenda (author), Kleijn, René (author), van Nielen, Sander (author), Donati, Franco (author), Sprecher, B. (author), Tukker, Arnold (author)Life cycle assessment (LCA) databases and software evolve. We analyzed to which extent software and evolving life cycle inventory databases affect the comparison of technology alternatives, using a comparative LCA on permanent magnets as a case study, with two selected software tools: CMLCA and Brightway LCA. We migrated the system models...journal article 2023
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Taipalus, Toni (author), Miedema, Daphne (author), Aivaloglou, E. (author)Querying a relational database is typically taught in practice by using an exercise database. Such databases may be simple toy examples or elaborate and complex schemas that mimic the real world. Which of these are preferable for students is yet unknown. Research has shown that while more complex exercise databases may hinder learning, they...conference paper 2023
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Verhoeven, C.J.M. (author), Montagne, A.J.M. (author)We are developing content and software to automate the homologation for our Electronics courses to deal with the increasing diversity in knowledge and skills of the master students who have completed their bachelor’s at other universities. The courses’ content has been structured such that dependencies between topics become explicit. A...conference paper 2023
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Pascoletti, G. (author), Huysmans, T. (author), Molenbroek, J.F.M. (author), Zanetti, E. M. (author)Human computer models represent a useful tool for investigating the human body response to external static/dynamic loads or for human-centred design. Articulated Total Body (ATB) models are the simplest human multibody models, where body segments are represented by ellipsoids joined at skeletal articulations. Over the years, regression models...journal article 2023
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Mazzoni, Filippo (author), Alvisi, Stefano (author), Blokker, E.J.M. (author), Buchberger, Steven G. (author), Castelletti, Andrea (author), Cominola, Andrea (author), Gross, Marie Philine (author), Mayer, Peter (author), Steffelbauer, David B. (author)A detailed characterization of residential water consumption is essential for ensuring urban water systems' capability to cope with changing water resources availability and water demands induced by growing population, urbanization, and climate change. Several studies have been conducted in the last decades to investigate the characteristics...journal article 2023
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Aivaloglou, E. (author), Fletcher, George (author), Miedema, Daphne (author)Interest in data systems education is increasing, especially with the rise in demand for well-trained and re-trained data scientists. The database and the computing education research communities have complementary perspectives and experiences to share with each other. The DataEd workshop is organized as a dedicated venue for these...conference paper 2023
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Mohammed, R.A. (author), Nadi Najafabadi, A. (author), Tavasszy, Lorant (author), de Bok, M.A. (author)Understanding the logistic determinants of freight trips is an important goal in freight transport modeling. Freight shipments move between nodes in the supply chain for different logistic purposes, including production, storage, transshipment, and consumption. A key problem with data availability is that databases generally do not identify...journal article 2023
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Wahdany, D. (author), Schmitt, Carlo (author), Cremer, Jochen (author)Weather forecast models are essential for sustainable energy systems. However, forecast accuracy may not be the best metric for developing forecast models. A more or less conservative forecast may be preferred over pure accuracy. For example, forecasting accurately in times of energy-deprived situations may be more important than in times of...journal article 2023
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Cai, Cynthia (author), Meines, Siebren (author), Poon, Chris (author), Powałka, Leon (author), Xia, Yitong (author), YAN, LAN (author)A 3D city model uses three-dimensional geometries to represent and model urban environments, in which the building model is the key feature. With the development of computer and data collection technologies, 3D city models are gaining growing capacities regarding storing rich information. This makes 3D city models more potentially useful than...student report 2022
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Sadowy-Sadowski, Tomasz (author)The concept of a spaceplane, a launch system that is a combination of an airplane and a rocket, is one of the most promising concepts of sustainable access to space. Along its trajectory, it experiences most extreme conditions with frequently opposing design requirements, making it one of the most complicated challenges in aerospace engineering....master thesis 2022