Promotores: S.F. Portegies Zwart, E. M. Rossi

Learning from small data sets in machine learning is a crucial challenge, especially when dealing with data imbalances and anomaly detection. This thesis delves into the challenges and methodologies of learning from small datasets in machine learning, with a particular focus on addressing data imbalances…

Promotor: Prof.dr. M. de Jong

Biological cells, the basic building blocks of all life forms, are surrounded by a lipid membrane. More than half of the membrane is occupied by membrane proteins, which can regulate the cell functionality through specific arrangements.

Patients share valuable advice and experiences with their peers in online patient discussion groups.

Promotor: J.N. Kok, Co-Promotor: A.J. Knobbe

When a star gets too close to a supermassive black hole, it is torn apart by strong tidal forces in a tidal disruption event (TDE).

Galaxies form and live inside dark matter haloes. As a consequence, they are exposed to the tidal fields generated by the surrounding matter distribution: this imprints a preferential direction to the galaxy shapes, which leads to a coherent alignment on physically close galaxies, called intrinsic a…

The intracluster medium (ICM) is a hot, tenuous and X-ray emitting gas that pervades galaxy clusters.

Patterned detectors are an existing technology that can be found in almost all color cameras.

In dit artikel onderzoeken Wout Broekema, Wouter Jong en Sara Perlstein het ontwerp en de beoordeling van crisisonderzoeken vanuit een leerperspectief.

This thesis advances automata learning, a key area in computer science, with applications in software verification, biological analysis, and autonomous technologies. It explores three main themes: first, it introduces a passive learning algorithm for generating compact probabilistic models from positive…

Wat doe je als je iets te weten wilt komen? Tegenwoordig gebruikt men voornamelijk het internet om informatie te verkrijgen. Een lezer moet deze informatie vaak uit meerdere bronnen halen en die bronnen met elkaar in verband brengen, om zo een compleet plaatje te vormen van het onderwerp. Soms is de…

Congres/symposium, Lorentz Center workshop

The work presented in this thesis is based on ALMA surveys of protoplanetary disks in three star-forming regions: Lupus, OMC-2, and NGC 2024.

Natural history collections provide invaluable sources for researchers with different disciplinary backgrounds, aspiring to study the geographical distribution of flora and fauna across the globe as well as other evolutionary processes.

For optimization problems, it is often unclear how to choose the most appropriate optimization algorithm. As such, rigorous benchmarking practices are critical to ensure we can gain as much insight into the strengths and weaknesses of these types of algorithms.

Promotor: K.E. Schalm, Co-promotor: S.S. Lee

Promotor: J.P. Abrahams, Co-promotor: T. Grüne

Promotor: Roeland M.H. Merks

Throughout the history of computer science, a major challenge has been how to assert that software is free of bugs and works as intended. Software bugs can lead to serious negative impacts on any software system. Throughout the main body of the thesis, we implemented a series of studies on exploring…

Streptomyces are bacteria abundant in soil that participate in diverse and complex interactions. These bacteria are the main producers of the antibiotics we currently use in the clinic.

Promotores: Prof.dr. J. Zaanen, Prof.dr. K.E. Schalm

We have studied shape with a particular focus on the zebrafish model system. The shape is an essential appearance of the phenotype of a biological specimen and it can be used to read out a current state or response or to study gene expression.

Vanaf de koloniale tijd tot heden hebben grote aantallen Javanen hun woonplaats verlaten om zich in andere delen van Indonesië of veel verder weg te vestigen. Vaak was deze spreiding gedwongen, vaak met traumatische gevolgen.

Over the past years it has been discovered that the population of extra-solar planets is large and diverse.

The investigations described in this thesis lay out strategies aimed at advancing antibiotic research and development. The examples presented revolve around two main approaches: understanding drug-target interactions and target identification.

Promotor: H.J.A. Röttgering, Co-promotor: M. Haverkorn

Prematurely born neonates require, amongst others, pharmaceutical therapy. Dosing guidelines for these therapies are often based on data from term born neonates or older infants, while these are not necessarily similar to prematurely born neonates.

This thesis addresses the chemical processes that determine the compositions of giant planet atmospheres.

This thesis presents insights from our study of various correlated electron systems with a scanning tunneling microscope (STM). In ordinary metals, electron-electron interactions exist, but get substantially screened due to the sheer number of electrons.

Dit project bekijkt het Oudgrieks vanuit het perspectief van de alledaagse schrijvers. Een corpus van meer dan 60.000 Griekse teksten op papyrus, van privébrieven tot petities en contracten geeft ons toegang tot de Griekse taal zoals die werd geschreven door gewone mensen in de oudheid (van 300 v.Chr.…

Dit deelproject pleit voor een nauwkeurige en forensische reconstructie van de financiële stromen van en naar de Sovjetrepublieken in Centraal-Azië in de naoorlogse periode.

This Thesis describes the synthesis of D-alanylated ribitol-based wall teichoic acids from S. aureus to probe their interaction with immune-binding partners.

This dissertation presents new cryptographic protocols, which can be divided into two families.

In dit artikel onderzoeken Thijs van Dooremalen en Philip Smith hoe het publieke discours over hittegolven is verschoven in Britse kranten.

Electoral Systems and Turnout: Evidence From a Regression Discontinuity Design. In dit artikel, gepubliceerd op de website SAGE research methods, bespreken auteurs Jaroslaw Kantorowicz en Tobias M. Hlobil hoe een Regression Discontinuity Design uitgevoerd kan worden.

Promotor: Prof.dr. A.G.G.M. Tielens, Prof.dr. C. Dominik (UvA)

Hydrocarbonylation of alkenes with carboxylic acids in synthesis of carboxylic acid anhydrides is relatively less explored. We herein present a study and optimization of a palladium-catalyzed hydrocarbonylation reaction of alkenes using carboxylic acids as the nucleophile, by which acid anhydrides can…

The marine shipping industry is one of the strongest emitters of nitrogen oxides (NOx), a pollutant detrimental to ecology and human health. Over the last 20 years, the pollution produced by power plants, the industry sector, and cars has been decreasing.

Promotor: Ronald Cramer, Co-promotor: Serge Fehr

Stars like the sun are born in large molecular clouds existing from gas and dust. During the formation process, the chemical composition of the material can be altered drastically by the changing physical conditions.

Promotores: Prof.dr. M. Franx, Prof.dr. P.G. van Dokkum (Yale University)

Almost three years after receiving her honorary doctorate, Dr Graça Machel returned to Leiden University. Over the course of two days she spoke with students, researchers, and other interested persons, about human rights – particularly those of women and children – in a world in which these are continually…

The class-imbalance problem is a challenging classification task and is frequently encountered in real-world applications. Various techniques have been developed to improve the imbalanced classification performance theoretically and practically.

In this thesis, we study different curved single crystals because of the diversity of surface structures across their curvature.

In our research protein translocation from Agrobacterium into yeast and plant cells is studied to obtain fundamental insights in the translocation process

Carbohydrates are present on the surface of bacteria making them suitable antigen candidates for vaccine development. This thesis deals with the synthesis of two carbohydrate-based components; the capsular polisaccharide of S. aureus type 5 and teichoic acids from staphilococci and enterococci speci…

Large areas of space are filled by molecular clouds that consist of gas and dust grains that are the remnants of dead stars. When these clouds start collapsing, the decreasing temperature and increasing density cause gas particles to start accreting onto dust grain surfaces.