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Matušovič, Marko (author)Optimizing SQL query execution through effective cost models is a critical challenge in database management systems (DBMS). This thesis introduces a modular benchmarking system for cost models, with a pluggable architecture for both cost models and execution engines, enabling comprehensive benchmarking across various scenarios. Accompanied by a...master thesis 2024
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Yang, Yue (author)The rise of urban digital twins emphasises the critical role of representing real-world environments for decision-making and collaboration among stakeholders. This leads to an expectation of effective management and visualisation of large-scale urban data models. 3D Tiles is an open specification designed for streaming and rendering massive...master thesis 2024
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Cai, Cynthia (author)Point cloud data are gaining more importance in the Geomatics domain, with the development of modern sensing technologies like LiDAR and photogrammetry. The size of massive point clouds are growing, and the performance of traditional database solutions for its data management become insufficient. It remains a huge challenge for researchers to...master thesis 2024
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Yildiz, Hüsna (author), de Vries, Marten (author), Öztürkoglu, Emirhan (author)This thesis describes the design of a low-cost class-S power quality analyzer based on a Raspberry Pi 4. Capable of detecting power frequency, magnitude, voltage dips and swells, harmonics, and total harmonic distortion, the project consists of four main components: the communication protocol, the interface, the algorithms for power quality...bachelor thesis 2024
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Rinauro, B. (author), Begovic, E. (author), Mauro, F. (author), Rosano, G. (author)The seaway trade market has expanded in the last years and container ship dimensions are constantly increasing for higher cargo capacity. In the early design stage, main dimensions are usually determined based on an existing ship database from which regression formulas are derived. In the present paper, a database of 260 non-sister container...journal article 2024
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Ranjbar, Roza (author), Segovia Castillo, P. (author), Duviella, Eric (author), Etienne, Lucien (author), Maestre, José M. (author), Camacho, Eduardo F. (author)This paper presents the design of a model predictive control (MPC) for the Calais canal, located in the north of France for satisfactory management of the system. To estimate the unknown inputs/outputs arising from the uncontrolled pumps, a digital twin (DT) in the framework of a Matlab-SIC2 is used to reproduce the dynamics of the canal, and...journal article 2024
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Zhang, Kaixuan (author), Shi, Zhaochen (author), Zujovic, Jana (author), de Ridder, H. (author), van Egmond, R. (author), Neuhoff, David L. (author), Pappas, T. (author)We present a systematic approach for training and testing structural texture similarity metrics (STSIMs) so that they can be used to exploit texture redundancy for structurally lossless image compression. The training and testing is based on a set of image distortions that reflect the characteristics of the perturbations present in natural...journal article 2024
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Agugiaro, G. (author), Pantelios, Konstantinos (author), León Sánchez, C.A. (author), Yao, Zhihang (author), Nagel, Claus (author)This paper introduces a new plug-in for QGIS that allows to connect to the free and open-source 3D City Database to load CityGML data, structured as classic GIS layers, into QGIS. The user is therefore not required to be a CityGML specialist, or a SQL expert, as the plug-in takes care of hiding from the user most of the complexity in terms of...conference paper 2024
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Zuo, Y. (author), Liao, Yishun (author), Yang, Y. (author), Ye, G. (author)Alkali-activated materials (AAMs) are one of green cementitious materials in building materials industry and beneficial to the goals of carbon peaking and carbon neutrality. Compared with ordinary Portland cement (PC) based materials, however, the raw material composition, reaction products and pore solution composition of AAMs are complex...review 2024
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de Haan, Laura (author)The frequent occurrence of catastrophic tailings dam failures underscores the urgent need to improve safety practices and minimise associated risks. This study introduces an advanced tool to evaluate the total Probability of Failure (PoF) of existing tailings dams systematically and effectively, supporting the rational prioritisation of...master thesis 2023
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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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Fitrianie, S. (author), Lefter, I. (author)Affective aggression is a form of aggression characterized by impulsive reactions driven by strong negative emotions. Despite the extensive research in the area of automatic emotion recognition, affective aggression is a phenomenon that has received less attention. This study investigates the use of head motion as a potential indicator of...conference paper 2023
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Sun, W. (author), Katsifodimos, A (author), Hai, R. (author)The rapid growth of large-scale machine learning (ML) models has led numerous commercial companies to utilize ML models for generating predictive results to help business decision-making. As two primary components in traditional predictive pipelines, data processing, and model predictions often operate in separate execution environments,...conference paper 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