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Book
Het experiment schepping : Het creatieve proces in cultuur, geloof en gemeente
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ISBN: 9021138182 Year: 2001 Publisher: Zoetermeer Uitgeverij Meinema

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Book
Geloven uit de kunst? : Een pleidooi voor geloofsverbeelding in de gemeente
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ISBN: 902113148X Year: 1990 Publisher: 's-Gravenhage Meinema

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Book
Turn it on : turnen en freerunnen vanuit sprongen
Authors: ---
ISBN: 9789463441971 Year: 2018 Publisher: Leuven : Acco,

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De auteurs hebben de turnoefeningen stap per stap opgebouwd, en ze bieden een brede variatie, zodat elke turner op zijn niveau kan oefenen. De materiaalopstellingen zijn efficiënt en elke oefening wordt aangevuld met didactische tips en helperstechnieken. Zowel klassieke turnoefeningen als nieuwe trends zoals freerunnen komen aan bod. Voor mij is dit boek een echte topper!" Vind jij turnen fantastisch en wil je in het turnen grenzen verleggen? Turn IT on geeft de perfecte oplossing. In dit boek werken de auteurs Bart Thijs en Robin De Vil via bewegingsfamilies een logische turnopbouw uit met focus op sprongen. Steunen, rotaties en slingeren komen in een ander boekdeel aan bod. De auteurs hechten veel belang aan een speelse, gevarieerde én veilige aanpak van de spel- en oefenvormen. Ze kijken over de muur van de turnzaal en gaan ook freerunnen. Vanuit hun jarenlange ervaring en tomeloze plezier in het turnen dompelen de auteurs je onder in het brede spectrum van recreatief turnen en freerunnen. Ze geven antwoorden op de meest uiteenlopende vragen die je je als lesgever, trainer of begeleider al eens gesteld hebt, zoals: hoe motiveer je je deelnemers? Hoe ga je om met niveauverschillen en grote groepen? Hoe zorg je voor een snelle succesbeleving, zowel individueel als in groep? Leg je graag de link naar andere sporten? Wil je je deelnemers zelfstandig maar toch gestructureerd laten werken? Turn IT on! Dat willen we iedereen aanraden, of je nu lesgeeft in het basis- of secundair onderwijs, of trainingen begeleidt in de turnclub of een recreatieve vereniging. Met Turn IT on. Turnen en freerunnen vanuit sprongen ga je off- én online aan de slag. De vele foto"s en zaalopstellingen nemen je onmiddellijk mee in de oefeningen. En de filmpjes, die via QR-codes scanbaar zijn met smartphone of tablet, helpen je de bewegingen duidelijk aan te leren en te laten uitvoeren. Dennis Goossens, Belgisch turner gespecialiseerd in de ringen, achtste op de Olympische Spelen van Rio (2016). "Ik vind turnen pure FUN. Het is grenzen verleggen én beleven. En dat is exact de focus van dit boek. Het zet je op weg naar turnlessen waarin zowel de doorsneeleerling als de gevorderde recreatieve gymnast uitgedaagd wordt.


Dissertation
Self-supervised Domain Adaptation of Pre-trained Language Models.
Authors: --- ---
Year: 2023 Publisher: Leuven KU Leuven. Faculteit Ingenieurswetenschappen

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Pre-trained language models (PLMs), trained on vast amounts of textual data, have become the de facto standard in the field of NLP. BNP Paribas Fortis (BNPPF), Belgium’s largest retail bank, utilizes different BERT-like models for diverse NLP tasks. Using their current strategy, each model is fine-tuned directly for specific tasks using annotated data. However, employing PLMs, pre-trained on general corpora, in specialized domains like that of BNPPF, can lead to performance decline due to domain shift. This Thesis investigates the potential of a single multilingual foundation model, adapted to the BNPPF domain, which can subsequently be fine-tuned for various NLP tasks within BNPPF. To facilitate the alignment with the BNPPF domain, an additional phase of self-supervised pre-training on exclusively BNPPF data (12.45M words) is introduced. In an additional experiment to address the high token fragmentation observed within the BNPPF corpus, the tokenizer’s vocabulary is expanded with domain-specific terminology through a frequency cut-off strategy. The domain-adapted model achieves superior performance on all three downstream tasks, with accuracy improvements of 3.1% and 5.2%, and a 1% increase in F1 score compared to directly fine-tuning the base model. Secondly, the domain-adapted model shows a faster convergence speed, resulting in training time reductions of 36% and 53%, especially interesting for applications that require frequent retraining. Finally, a single foundation model simplifies model governance and eliminates the need to search for a dedicated PLM for each distinct task. To further solidify the effectiveness of the proposed method, research should evaluate the domain-adapted model on a broader range of tasks. The advantage of vocabulary expansion in this context remains unclear and requires further exploration. Overall, the research in this Thesis shows that the domain-adapted model increases performance, reduces training duration, and offers a streamlined approach to NLP tasks at BNPPF. More generally, these results confirm that domain-adaptive pre-training is an effective method to align general PLMs to specialized domains, such as the banking domain.

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Dissertation
Using a structural classification model for the clustering of scientific abstracts
Authors: --- ---
Year: 2016 Publisher: Leuven KU Leuven. Faculteit Ingenieurswetenschappen

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In this internship we examine the possibility of clustering scientific abstracts on the basis of their content. A previous approach based these clusters on noun phrases (NPs) extracted from the ab-stract’s sentences, but it was found that they were rather inconsistent; some clusters were formed on the basis of their object of study while others occurred due to similar techniques that were em-ployed. Hence we devise an approach to automatically detect an abstract’s structure in order to be able to determine whether a NP occurs in the ‘introduction’, ‘methodology’ or ‘conclusion’ section. A Random Forest classifier with a wide range of structural, morpho-syntactic and lexical features performed best for this task. The accuracy of the model was fairly satisfactory (about 87%, although the recall for methodology sentences was quite low). However, the clusters that were formed on the basis of this classification were rather unsatisfactory. We suggest that the most likely explana-tion is the lack of any criterion to distinguish ‘irrelevant’ extracted NPs from others, and propose several solutions to this problem.

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Dissertation
Studying the impact of COVID-19 on the European Air Transportation Network
Authors: --- ---
Year: 2023 Publisher: Leuven KU Leuven. Faculteit Ingenieurswetenschappen

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Drastic loss of flight connections due to the COVID-19 pandemic has called for new approaches to accurately study structural change in the European Aviation Network. This thesis highlights the limitations of traditional centrality-based network approaches and proposes a diffusion-based graph embedding approach using the GraphWave algorithm. Over the course of two studies, this new approach was validated using domain knowledge and tested in its ability to capture known events that occurred during and after the COVID-19 pandemic, and implemented in an overarching study on the evolution of both the global connectivity as well as the structure of the European Air Transportation Network from January 2020 to December 2022. In terms of global connectivity, this study finds strong differences in recovery rates for flights across six different market segments. In terms of network structure, the study finds that structural roles that are present in the pre-covid network have seen a loss in performance over the course of the pandemic, but have recovered to pre-covid levels. Using regional changes in structural roles, this study identifies Italy as the region with the strongest increase and the United Kingdom as the region with the strongest decrease in structural role, finding substantial differences in recovery rates per market segment. Lastly, special attention is paid to the effect of the Russia-Ukrainian war on the European Air Transportation Network. Here the study finds no direct decrease in structural role is found in the neighboring countries, but does find a loss of approximately 383.000 flights (roughly 21%) that can be attributed to the war, with Turkey, Germany, Italy, France, and Poland being the regions that lost the most flights.

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Dissertation
The effectiveness of the graph neural network based GraphSAGE algorithm in classifying unusual transactions related to money laundering
Authors: --- ---
Year: 2020 Publisher: Leuven KU Leuven. Faculteit Ingenieurswetenschappen

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In this thesis, I explore whether graph representational learning can enhance the detection of money laundering. Money laundering can be represented as a pattern in a graph where transactions are mapped as edges and the receiving or sending entities as nodes. These patterns can be captured using graph representational learning and be used in a classifier to predict if someone is involved in money laundering. I've explored various methods for graph representational learning and assessed them based on requirements derived from this use case. The GraphSAGE algorithm which is based on a graph convolutional neural network, is selected as most promising. This algorithm builds a representation of a neighbourhood per hop. At every hop, the local neighbourhood of a node is aggregated into one vector, reduced in size with a convolutional layer and is used as input for the next hop. The reduced vector of a neighbourhood in the final hop is called the node embedding and contains condensed information of the nodes local graph neighbourhood. I've created node embeddings for the customers using three different approaches; the GraphSAGE algorithm, a variant of the GraphSAGE which includes edge labels and direction in combination with a deterministic sampling approach and a graph auto encoder using the sampling strategy of GraphSAGE. I've used these embeddings together with the classical feature set, derived using domain knowledge, and have trained a random forest classifier to assess if the embeddings can enhance the detection performance. The results show no significant improvement in performance between the classifier trained including the embedding features and excluding. This is likely due to the limited number of positive labels available for training. To strengthen this assumption, I've trained a classifier to predict whether the node is a retail customer or a corporate customer using only the embeddings. This problem is better balanced and contains more labels. The performance of this classifier has a precision recall auc of >99%. Secondly, I've clustered the embedding of all corporate customers and compared the cluster assignment with the industry type, assuming that corporates with the same industry type have similar transaction patterns and therefore a similar local graph neighbourhood. The clustering shows a significant correlation with the industry type. From these experiments, I conclude that embeddings can be effective in condensing the information of a customers' local graph neighbourhood.

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Dissertation
Anti-Money Laundering: transaction monitoring optimization
Authors: --- ---
Year: 2021 Publisher: Leuven KU Leuven. Faculteit Ingenieurswetenschappen

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The Office on Drugs and Crimes (UNODC), estimates that annual money laundering is 2-5% of global GDP, or 1.7-4.3 trillion US dollars. [1] Over the last years, many banks have been fined for not doing enough to stop money laundering. [2] These financial institutes are now hiring experts to help them improve their transaction monitoring, i.e. identifying suspicious patterns of transactions. Traditionally, a set of rules was used to determine if a transaction was fraudulent or not. But these rule-based systems are oversensitive, i.e. had many false positives. Triage teams must manually check all the alerts, but they are overwhelmed due to the vast number. This is where Complidata comes in. Their solutions use machine learning to detect fraudulent transactions and in doing so decreasing the workload for the triage teams. The first part of this report explains the terminology and gives a framework to the entire industry. This is followed by a detailed overview of the current solution pipeline. In the second part we go in depth into several improvements on Complidata’s existing pipeline. The first one helps to identify the features used for the actual classification. This gives the user the framework to rapidly search among different hyperparameters and determine the impact on the selected features and on the overall result. The second involves three different imputation techniques: mean & mode, expert knowledge, and machine learning model. Sadly, no significant accuracy gains could be made. The full imputation code does give Complidata the opportunity to quickly investigate several imputation techniques. And the last improvement looks at a new algorithm, CatBoost, that is showing positive results in other applications. [3] [4] It was demonstrated that on our particular dataset we had an increase in accuracy, i.e. ROC, and prediction time compared to random forest. The Complidata pipeline and the improvements were also used on the final real use case were everything came together. Special importance was put into the pre-processing of the data which included many conversations with the client to better understand the data.

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Dissertation
Content-based science mapping: multi-label text classification
Authors: --- ---
Year: 2020 Publisher: Leuven KU Leuven. Faculteit Ingenieurswetenschappen

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Contemporary science mapping is usually done by clustering or is based on citations. In addition, the journals in which they are published, could serve as an indication of the scientific field the publication belongs to as well. In this paper, a multi-label classification model based on the content of the publications is developed. This means a predefined framework is at hand, unlike the clustering methods, and the content of the article itself is used instead of citations or journals. This paper is the progress report of an internship at ECOOM, Leuven. To get started, some traditional methods, such as Naive Bayes and logistic regression, are used to set up a baseline classifier. The final model is an LSTM neural network.

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Dissertation
Error Ranking and Error Annotation of NFR Translation Using the SCATE Taxonomy
Authors: --- ---
Year: 2021 Publisher: Leuven KU Leuven. Faculteit Ingenieurswetenschappen

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This Master’s thesis is the result and presentation of the work that was done by the author for his internship at the Ghent University research group LT³ (Language and Technology Translation Team) as part of the Master of Science in Artificial Intelligence. It forms part of a longer, three-year study and functions as a pilot study. It aims to manually assess the quality of the translations produced by a baseline Neural Machine Translation (NMT) and a Neural Fuzzy Repair (NFR, a recently developed kind of NMT) system by error ranking, and to perform a fine-grained error annotation. The first step of the pilot study (which uses a smaller dataset as a trial version) aims to define the details of the methodology: How to set up the ranking evaluation, how to automate this step, which types of sentences to compare, use an existing error taxonomy or not? In the second step, these evaluations are performed on a larger dataset. The most important conclusions were that 1) although, according to the evaluator, the NFR system did not outperform the baseline NMT system in both the survey and the error annotation, 2) the NFR output did resemble the reference translations more than the baseline NMT output did, which may mean that the NFR-generated translations are stylistically of better quality. However, it should be noted that these results are not necessarily generalisable.

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