Evaluating Constant Failure Rates in Storm Surge Barriers: A Statistical Framework Applied to Censored Component Lifetimes of the Oosterscheldekering

This study examines the validity of constant failure rates in the reliability assessment of storm surge barriers, with a focus on the Stormvloedkering Oosterschelde (SVKO). Analysing a dataset of 1,501 malfunctions, including 87 critical incidents over six years, we employ Exponential and Weibull statistical models to assess failure rates. The...

Automated detection of failures based on service records

With the ever-increasing need to reduce the use of fossil fuels, Tesla is accelerating the world's transition to sustainable energy. This means replacing all internal combustion vehicles with electric ones over time. The growing number of Tesla vehicles on the road poses interesting scaling challenges for all departments especially for the...

Hawkes Processes in Large-Scale Service Systems: Improving service management at ING

Through the expansion of large-scale service systems and the exponential growth of data generated by complex IT infrastructure components, gaining a comprehensive overview of the different levels of service within an IT system has become increasingly challenging. In particular, this brought to the fore the question from a large commercial bank...

Evaluating students' study habits using Bayesian Multinomial Logistic Regression

The Bayesian approach is a very important approach for tackling problems in statistics. It involves choosing a distribution that reflects the prior knowledge and  thus takes all knowledge into account in contrast to the frequentist approach. It also assumes that the parameters (the regression coefficients) follow a distribution called the...

Restoration of Missing Data using a Human Adaptive Framework: The Cleansing Algorithm

Improving data quality is of the utmost importance for any data-driven company, as data quality is unmistakably tied to business analytics and processes. One method to improve upon data quality is to restore missing and wrong data entries.  </p><p class="MsoNormal">The goal of this research is construct an algorithm such...

Verschillen tussen alef-nul en alef-één

De 'grootte' van een verzameling staat in de wiskunde bekend onder de term 'kardinaliteit'. Omdat de kardinaliteit van de natuurlijke getallen niet met een eindig natuurlijk getal <i>n</i> kan worden aangetoond, is de kardinaliteit van deze verzameling uniek gedefinieerd als alef-nul. Met dank aan Cantor’s bewijs voor de stelling dat de...

Causal inference with multi-state models, applied on estimating the effect of the IUI treatment timing for couples with unexplained subfertility

This thesis examines statistical methods to find the right timing of intrauterine insemination treatment relative to the start of the follow-up of the couples. Intrauterine insemination is a fertility treatment conducted by injecting refined sperm into a woman's uterus. Lots of research has been done on timing of steps within one IUI cycle....

Forensic speaker recognition: Based on text analysis of transcribed speech fragments

Currently, speaker recognition research is mainly based on phonetics and speech signal processing. This research addresses speaker recognition from a new perspective, analysing the transcription of a fragment of speech with text analysis methods. Since text analysis is based on the transcription text only, it can be assumed independent from...