Designing Software for User-Friendly Class-S Power Quality Analyzer based on Raspberry Pi

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...

Mapping hyperbolic space for the virtual reality game "Holonomy"

Non-Euclidean spaces are spaces that do not satisfy all of Euclid’s postulates. An example of such a space is hyperbolic space. In this paper, a method is discussed to draw a tessellation of hyperbolic space in a manner that fits with the virtual reality game "Holonomy", a game which takes place in hyperbolic space. The main result shows that...

GitHub Mining: The Implementation of Continuous Integration Pipelines

While continuous integration has already been proven to positively affect software development, little is known about how it should be implemented based on project context. This paper investigates how CI pipelines are configured by analysing data mined from software projects on GitHub. This re- search has shown the continued rise of the CI plat-...

Breaking the knapsack cryptosystem

We live in an online world: we date online, we do business online and we communicate online. To make sure this happens securely, almost all transferred data is encrypted by cryptosystems. This paper focuses on one of these: the knapsack cryptosystem of Merkle and Hellman, which relies on the hardness of solving the knapsack problem (1978). In...

Clebsch-Gordan Coefficients: A Quantum Mechanical and Mathematical Perspective

In this work, Clebsch-Gordan coefficients are studied from both a quantum mechanical and a mathematical perspective. In quantum mechanics, Clebsch-Gordan coefficients arise when two quantum systems with a certain angular momentum are combined and the total angular momentum is to be found. We start by discussing the relevant postulates of quantum...

Postfiltering in Adaptive Feedback Cancellation for PA Systems

The most promising method for acoustic feedback control in public address systems is adaptive feedback cancellation (AFC). This approach is based on making an estimation of the room impulse response, which is used to subtract an estimate of the feedback from the microphone signal. A postfilter is often used to improve the performance of such an...

Improving Test Case Generation for RESTful APIs through Seeded Sampling

To validate the quality of software, test cases are used. These test cases are often manually-written, which is labor-intensive. To avoid this problem, automated software testing was invented. Search-based software testing is a useful tool for developers to automatically generate test cases. However, improvements are still needed to create test...

Estimatic

Amsterdam Airport Schiphol has 5 runways, each of which can be used for take-off or landing of aeroplanes. The weather heavily influences which runway configuration air traffic control might pick. Airport Forecasting Service (AFOS) predicts which configuration of runways works most efficiently given a set of expected weather conditions and the...

Creating an online auctioning clock

For this project, JEM-id tasked us with creating a proof of concept of a new online auction in the form of a web application for Royal FloraHolland. JEM-id is a software company operating in the agricultural domain.<br/>The pre-existing digital auction is not available as a web application and has generated technical debt over the past twenty...

Classification of diverse bacterial populations

Accurate diagnosis and treatment of patients infected with multiple strains of a pathogen is a challenging task. The use of whole genome sequencing techniques provide high potential to give proper insight into the microbial composition of human metagenomic samples. Distinguishing multiple strains of a certain species is difficult due to the high...

Robot Block-Based Programming: Teaching children how to program an interactive robot using block-based programming language

Robots play an increasingly large role in society and some material already exists that allows children to program robots in elementary school. However, this material often neglects the interactive capabilities of modern robots. The aim of this project is to teach children how to write interactive programs for a robot. For this purpose, a NAO...

Familial searching in DNA databases

We start our introduction to DNA matching with the direct match case: we find DNA at a crime scene and find a direct match with a member of our database. To measure the strength of our case against the match, we use likelihoodratios. We differentiate between two different situations: the probable cause case, where we already suspect our match and...