Mycorrhizas are symbiotic associations between soil fungi and most plant species.

Leiden psychologist Wilco van Dijk and communication scientist Jaap Ouwerkerk of VU University Amsterdam published a book about the emotion Schadenfreude. The authors describe what the emotion Schadenfreude really is, when people experience the emotion, and what role it plays in social relations.

Understanding the formation and evolution of planetary systems is one of the most fundamental challenges in astronomy. To directly image and study young exoplanets and the circumstellar disks they form from, dedicated high-contrast imaging instruments are built.

Ice, the solid state of water, plays an important role on our planet as well as the entire universe.Despite the fact that an individual water molecule has a very simple structure, its chemical bonding in the solid phase can be surprisingly complex.

Double Bind. Public service professionals coping with contrasting demands. How do public service professionals align their PSM with contrasting demands set by the organizational and social contexts in which they work?

The goal of this study is to systematically investigate how intonation (speech melody) is conveyed in whispered speech.

Can we make quantum devices from quantum surprises? And can we explore and build life from the nanoscale up?

How were (post) colonial migrants included in post-war welfare systems?

Twenty years from now, the world population is estimated to be around 8.7 billion people, compared to the current 7.3 billion. In combination with the improvements in living standards and the corresponding growth in consumption, this will result in an enormous increase in the demand for food, consumables,…

Is online radicalisation is an analytically useful concept when discussing contemporary cases of terrorism?

The main question addressed in this thesis is how we can best conceive the contrast between a priori and empirical truths.

The research group Science Communication and Society aims to understand how science communication works to improve the interaction between science and society. Central themes are ‘Bridging the gap between experts and the general public’ and ‘Evaluating Science Communication’.

Promotor: Peter Stevenhagen

How is the effect of kleptocracy on foreign policy change mediated by the political-administrative relationship?

Promotor: A. Achúcarro Co-promotor: A. Boyarsky

Ömer Gürlesin defended his thesis on 28 November 2018

The thesis wishes to examine the pathways of thought underlying the creative act of music making and the performance practice of complex music from the late twentieth and early twenty-first century.

This book explores the boundaries of the category of gender and their theoretical significance within the framework of Canonical Typology.

Experience, Narrative, and Criticism in Ancient Greece pursues a new approach to ancient Greek narrative beyond the taxonomies of structuralist narratologies.

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

Despite the history of studies on methanol formation from CO2, the dominant elementary reaction steps that constitute the chemical mechanism for this catalyzed process are not determined.

This book offers a comprehensive and accessible introduction to a novel theory of syntax, which analyzes grammar from a semantic perspective.

For many system in statistical physics the microcanonical and canonical ensemble are equivalent in the thermodynamic limit, but not for all.

On the 3rd of September, Adrian Stenton successfully defended a doctoral thesis. Leiden University Centre for Linguistics congratulates Adrian on this achievement!

The aim of this study is to specify the strategic function of stance adverbs when qualifying a standpoint in an argumentative discussion.

Majorana fermions in superconductors are the subgap quasiparticle excitations that are their own antiparticles.

The Secret Life of Art Works. Exploring the Boundaries between Art and Life is the first collection of essays to present case studies from the visual arts, architecture, sculpture and numismatics, and to engage critically with theoretical perspectives from art history, psychology, aesthetics and ant…

The Standard Model (SM) of particle physics fails to explain several observed phenomena and is incomplete. In order to resolve this problem, one may extend the SM by adding new particles.

The central inquiry of this thesis revolves around how ontology can adequately accommodate the existence of necessary physical relations. Initially, the thesis demonstrates the imperative acknowledgment of necessary physical relations by showcasing the failure of Neo-Humean theories.

Today’s performances of medieval polyphony have a lot in common with those of other ‘classical’ or ‘early’ music. Ensembles perform pieces written by known or lesser known composers, which the listener can revisit by listening to recordings or reading a score.

A global perspective

Despite being the object of intense study, embryonic development has been difficult to model due to a number of reasons. First, complex tissues can be comprised of many cell types, of which we probably only know a subset.

This dissertation addresses the semantics of pluractional verbs in Hausa.

In this project we study the properties of statistical- and rule-learning mechanisms in relation to the acquisition and evolution of language. We ask to what extent these mechanisms are unique to humans - or to human language - by comparing the acquisition of vocal structure in two species: humans (infants)…

Promotor: Prof.dr. I.A.G. Snellen, C.U. Keller

Global Transformations and Governance Challenges (GTGC) at Leiden University aims to advance knowledge and practice on how we govern – and could govern – major world-scale changes in contemporary society. These global transformations include hegemonic and other geopolitical shifts, ecological changes,…

When EU member states signed the Treaty of Lisbon in 2007, they did not anticipate the manifold crises in store for them over the following years. Instead of the intended consolidation of a Union which had just gone through its most profound modernisation and biggest round of enlargements, the EU has…

From 1550 onwards, a great interest in the natural world developed across Europe. This interest was not only stimulated by a growing knowledge of local flora and fauna, but also by the import of numerous exotic animal and plant species. Think, for instance, of researches and collectors like Gessner…

Representations of violence are often said to generate cathartic effects, but what does “catharsis” mean? And what theory of the unconscious made this concept so popular that it reaches from classical antiquity to the digital age?

Teaching excellence is one of the core functions of the War, Peace and Justice (WPJ) research group. WPJ members engage in diverse forms of public engagement, but all share a commitment to education.

Why do black holes emit thermal radiation? And how does a closed quantum system thermalize?

My work is motivated by the necessity to extend Standard Model of Particle Physics in order to explain three observed phenomena that this great theory fails to accommodate

This dissertation shows that dialogical logic constitutes a powerful and flexible general framework for the development and study of various logical formalisms and combinations thereof.

‘The storm of the passions rages’: The works of Johannes Jelgerhuis as a source of stagecraft for the historically informed performer.

Stochastic resetting is simple enough to be approached analytically, yet modifies stochastic processes in a non-trivial way.

The project investigates how bilingual speakers navigate lexico-syntactic features, including grammatical gender, classifier systems, and the linear order of adjectives and nouns, across Spanish and Chinese in both unilingual and bilingual contexts.

Promotores: J.C. van Houwelingen, S.A. van de Geer

Knowledge and culture subproject 1:

The Hague Journal of Diplomacy (HJD) is the world’s leading research journal for the study of diplomacy and was founded in 2005. The journal is published by Brill.