If X is a locally compact Hausdorff space, then a representation of the complex C* algebra C_0(X) on a Hilbert space $H$ is given by a spectral measure that takes its values in the orthogonal projections on $H$.

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.

Sophie Ernst’s doctoral thesis is an artist’s contribution to media art theory.

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 doctoral trajectory explores sound, its image and its role in relating humans and our technologies to the environment.

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?

This thesis examines the complexity of legislative decisions within the EU, with a specific focus on the Council of the EU.

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.

Mechanical forces are known to play an important role in bacterial colonies. In this dissertation, we study the self-organization at various stages of growing bacterial colonies, and focus on the mechanical effects of cell growth.

In this thesis, we study systems of electrons in which strong correlations give rise to emergent exotic physics.

In this article, Honorata Mazepus, assistant professor at the Institute of Security and Global Affairs, and Dimiter Toshkov, associate professor at the Institute of Public Administration, discuss whether the winner–loser gap extends beyond the political domain to subjective health and well-being as…

The physical origin of the dozens of stellar-mass binaries, the mergers of which have been detected by the LIGO-Virgo-KAGRA collaboration via gravitational waves, is still unknown.

How can complexity science advance intelligence transformation?

The project Multimedia Research and Documentation of African Oral Genres: Connecting Diasporas and Local Audiences (Director: D.Merolla) focuses on multimedia as technology that allows scholars to share documentation and scientific knowledge with the cultural owners of the collected oral genres.

Hydrodesulfurization (HDS) is an ubiquitous part of oil refining that ensures that fuels are cleaned of impurities and environment release of pollutants such as SOx and NOx gasses are minimized.

This article aims to provide a coherent foundation for empirical studies of interpersonal discussion on risk.

El Chorro de Maita, Cuba

Mission statement

Novel entities may pose risks to humans and the environment. The small particle size and relatively large surface area of micro- and nanoparticles (MNPs) make them capable of adsorbing other novel entities, leading to the formation of aggregated contamination.

On the 4th of September, Elisabeth J. Kerr successfully defended a doctoral thesis. Leiden University Centre for Linguistics congratulates Elisabeth on this achievement!

In this article, Meier & Nadler suggest that while non-citizen enfranchisement boosts participation across all citizens, citizens with immigration backgrounds are more reactive to the NCV rights in terms of higher turnout. In this way, the paper adds a critical nuance to individual-based explanations…

Promotor: Prof.dr. T. Hankemeier, Co-promotores: Heiko van der Linden, Paul Vulto

El pueblo Kamëntšá en la encrucijada del patrimonio cultural

Leiden Observatory provides a dynamic, international environment for work and study. Established in 1633, the institute has a very rich tradition. The famous Old Leiden Observatory is the oldest operating university observatory in the world. At Leiden Observatory we carry out world class research and…

How have the armed forces of the United Kingdom, the Netherlands and Belgium adapted to the OMLT task in Afghanistan, and what institutional changes have materialised as a consequence of this adaptation?

The first results of the “Policing European Metropolises project” (PEMP) that associate Professor Elke Devroe and Professor P. Ponsaers launched in April 2013 are now published. Having been the referent for The Netherlands and Belgium in the Urbis project (Leonardo programme), the project focuses on…

The central goal of academic publishers is the dissemination of the results of research and scholarship. Their audiences can generally be divided into two categories. Academic publications are firstly made accessible to the scholarly community, so that these texts can form the input for new academic…

This research aims to study the practice of cremation in Alexandria and Graeco-Roman Egypt, through the examination of its cinerary urns.

Does foreign aid promote human rights?

How do we experience electronic music? How does electronic music operate on perceptual, cognitive and affective levels? What are the common concepts activated in the listener’s mind when listening to electronic music? Why and how are these concepts activated?

On the 5th of September, Zhen Li successfully defended a doctoral thesis. Leiden University Centre for Linguistics congratulates Zhen on this achievement!

In astronomy, the interpration of observations and measurements plays a crucial role: we rely purely and fundamentally on the information that reaches us as observers. And 80% of all matter in the universe is undetectable directly.

Irna Hofman defended her thesis on 10 January 2019.

How does the cluster bootstrap procedure in combination with various types of linear models perform in the analysis of longitudinal data, compared to other methods.