Heterogeneous catalysis is one of the fundamental processes of modern life, being common in industrial refinery and hydrogen vehicles, all the way to the living cell. The dissociation of H2 on Cu(111) is an important benchmark system for studying heterogeneous catalysis, with a large and varied amount…

The application of nanomaterials in industrial processes and consumer products provides many societal benefits, but can also lead to the release of nanomaterials into the environment. The work in this dissertation aims to provide insights into the potential environmental impacts that may follow from…

Promotor: Prof.dr. H.P. Spaink, Co-promotor: Dr. M. van der Zee

In this thesis, we show that we can use Shimura’s CM theory to explicitly compute the Hilbert class field of any primitive quartic CM field.

Studievoorlichting

In this dissertation, matching, entropy, holes and expansions come together. The first chapter is an introduction to ergodic theory and dynamical systems.

Artin L-functions associated to continuous representations of the absolute Galois group G_K of a global field K capture a lot of information about G_K as well as arithmetic properties of K.

The work described in this dissertation contributes to a better mechanistic understanding of nanoparticles in vivo. To achieve that goal, we used the zebrafish as a highly predictive pre-screening model of nanoparticles.

This thesis focuses on protoplanetary disks: flattened structures of gas and dust around young stars in which planets are expected to form and grow.

De Filipijnse antropologen Andrea Malaya M. Ragragio en Myfel D. Paluga blikken terug op de baanbrekende Netflix show Trese en waar het aan ontbrak bij de verhalen van inheemse volken. Zij publiceerden het artikel 'What Netflix Got Wrong About Indigenous Storytelling' in het digitale antropologie tijdschrift…

Astronomical observations of cold regions in the universe show a rich inventory of ices. Part of these ices may end up on planets like our own, but in that journey they will be exposed to considerable amounts of radiation.

Op 13 januari 2022 verdedigde Pie Habimana het proefschrift 'Harmful Tax Competition in the East African Community'. Het promotieonderzoek is begeleid door prof.dr. H. Vording en prof.dr. S.C.W. Douma (UvA).

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: H.W. Lenstra, A. Lucchini

Promotor: Prof.dr. E. Bouwman, Co-promotor: S. Bonnet

This thesis is dedicated to the exploration of the primordial dark ages: unknown physics during the earliest stages of the Universe’s expansion that have not yet been directly probed by observations. Cosmic inflation is a burst of exponential expansion of space after the “Big Bang”.

This thesis is comprised of three chapters covering the theme of studying semistable varieties by looking at their dual combinatorial objects.

Promotor: B. van de Water

Plants, are sessile organisms, have developed strategies to adapt to changes in their environment, in part by altering their growth and development.

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

The research provides insight into disease behavior in both rural and semi-urban areas in Serengeti in Tanzania.

A management strategy has been developed for field margins to reduce pesticide drift to non-target areas and to promote biodiversity on arable land. To this end, 3 and 6 m wide strips along the edges of winter wheat, sugar beet and potato crops have been left unsprayed with herbicides and insecticides…

This work describes several studies into the electroreduction of carbon dioxide (CO2RR), both regarding mechanistical aspects and catalyst stability considerations. Mechanistic insights into carbon-carbon bond formation on a silver catalyst are described in Ch 2, were we find an acetaldehyde-like surface…

In dit proefschrift wordt gekeken naar de produktie en consumptie van het reality-tv-programma ‘Nieuwe Wijze Oom’. Deze show, uitgezonden op het entertainmentkanaal van de provincie Shanghai, draait om mediation in conflicten tussen burgers. ‘Nieuwe Wijze Oom’ is geliefd bij het publiek én bij de autoriteiten.…

Optical cavities are useful tools to enhance the interaction between light and matter, which is important to make good quantum emitters. However, it turns out that the cavities themselves (without any quantum emitters) are already interesting objects to study.

Promotor: R. Tijdeman, Co-promotor: C. Kraaikamp

In this thesis we study the moduli space of genus g curves, and the differential forms that occur naturally on this moduli space.

The thesis introduces three methods for high-dimensional prediction problems in the biomedical field. The methods make use of empirical and variational Bayes in the estimation.

This thesis contains results on the arithmetic and geometry of del Pezzo surfaces of degree 1.In Chapter 1 we give the necessary background, assuming the reader is familiar with algebraic geometry.

Promotor: P.M. Brakefield

In deep reinforcement learning, searching and learning techniques are two important components. They can be used independently and in combination to deal with different problems in AI, and have achieved impressive results in game playing and robotics. These results have inspired research into artificial…

A linguistic prehistory of the Tarim Basin in Northwest China

How can we broaden youth participation in STEM Learning

Promotor: Richard D. Gill

Evolution acts via mutations in amino acid sequences. Substitution of essential amino acids leads to a nonfunctional protein. l.

Make more fluid: In condensed matter systems, electrons can acquire unusual properties from their interaction with the atomic lattice.

In this Thesis, novel charge induction mechanisms of ionic liquids are treated, tested and experimented on complex oxides, in particular cuprates.

This thesis describes how different colours of light affect various aspects of the growth and development of Arabidopsis and tomato plants⁠.

Promotor: A. Achúcarro, Co-Promotor: G.A. Palma

This thesis describes the importance of being able to control the selectivity of potential drug candidates.

In this thesis, we have used numerical approaches to study the effects of translational symmetry breaking on strange metallic systems as realised by the holographic duality⁠.

The work in this thesis demonstrates how to obtain an atomic-scale picture of a diverse set of complex surface structures observed using STM, under disparate conditions.

Politicoloog Rebekah Tromble (Universiteit Leiden) en sociolinguist Dirk Hovy (Universiteit van Copenhagen) analyseren hoeveel vijandigheid en sexisme Clinton heeft te verduren op Twitter en waar de aanvallen op haar persoon vandaan komen.

Promotor: Prof.dr. M.T.M. Koper, Co-Promotor: F. Calle-Vallejo

Promotores: Prof.dr. M. Franx, Prof.dr. M. Kriek (Univ. of California at Berkeley)

From the 1920s on, popular music in Southeast Asia was a mass-audience phenomenon that drew new connections between indigenous musical styles and contemporary genres from elsewhere to create new, hybrid forms. This book presents a cultural history of modern Southeast Asia from the vantage point of popular…

My PhD research is devoted to studies of the conjectural cluster-algebraic symmetry in the theory of topological string, which is the simplest, however already non-trivial sector in the theory of string.

Promotor: Prof.dr. P. Stevenhagen, Jan-Hendrik Evertse, Co-promotor: Pascal Autissier

Op dinsdag 6 september is het facultaire jaar 2022-2023 begonnen met Leiden Law Op 1, onze jaarlijkse live talkshow vanuit het Kamerlingh Onnes Gebouw. Met het bestuur, wetenschappers en studenten keken we vooruit naar het nieuwe collegejaar.

The research in this dissertation aims to optimise blood donation processes in the framework of the Dutch national blood bank Sanquin. The primary health risk for blood donors is iron deficiency, which is evaluated based on donors' hemoglobin and ferritin levels.