On 10 February 2022, Christian Mommers defended the thesis 'Voluntary return and the limits of individual responsibility in the EU Returns Directive'. The doctoral research was supervised by Prof. P.R. Rodrigues and Prof. P. Boeles.

The aim of this dissertation is to provide insight in interethnic prejudice of children in the Netherlands and attitudes and ideologies that they are exposed to through two socialization agents (parents and children’s books).

Performances of solo keyboard repertoire can sound more or less polyphonic depending on the performer’s use of divergence in expression.

Imagining the Americas in Print contains eleven essays, seven of which have been published before and four of which are new.

Astronomers have measured the mass of a dormant, supermassive black hole in the early universe for the first time. Thanks to a combination of the James Webb Space Telescope and a natural cosmic magnifying glass, researchers were able to weigh the black hole directly based on its gravity.

Sarah Michiel is the Institute Manager of NIMAR and has been living in Morocco since 2012. Due to the coronavirus, she has been working in Belgium since 20 March, where she grew up. The NIMAR office in Rabat is currently empty and all visits and conferences have been cancelled. Sarah is trying to run…

The factors that dynamically sculpt the inter-regional correlation of brain patterns are poorly understood. Here, we test the hypothesis that they are shaped by the catecholaminergic neuromodulators norepinephrine and dopamine.

What are the various forms of inter-organizational collaboration in the public safety sector? How are different forms of inter-organizational collaborative arrangements related? What is the relationship between inter-organizational collaboration and innovation in the public safety sector?

How can we understand the encounter between communities active in sustainability initiatives and governmental agents at the multiple institutional layers in the Netherlands?

In my research I am concerned with the possibility of a politics of sexuality without reverting to identitarian conceptions of sexuality. In a reading of the work of the American author James Purdy, I propose to move towards a politicizing of the concept of narrative identity as developed by the French…

Investigating the intercultural connections that shaped practices of knowledge production in colonial Dutch Brazil.

The aim of this project is to study the influence of Longinus’s treatise ‘On the sublime’ on practice and theory of architecture and theatre in seventeenth-century Paris and Amsterdam.

The principle aim of the project is to study the genesis and the quantitative properties of the Early Roman urban network of the Balkan and the Danube provinces.

Johannes Boer's research intends to question the way explicit knowledge is applied in order to restore and perform music from the past with the intention to get as close as possible to its original meaning.

This project aims to excavate and date the setting of the east gate of the Roman fortress of Udhruḥ. This will be compared with other Diocletianic military installations from the region. We also hope to retrieve another gate inscription which can shed light on the function and political embedding of…

Subproject of

Research into the wishes and (care) needs of older migrants

This research sets out to answer the following questions:

Timo Slootweg, associate professor at he department Philosophy of Law, published a chapter about Paul Scholten in

Homicide followed by the suicide of the perpetrator often leads to shock and incomprehension. It has been suggested that media reporting on such cases could lead to an imitation effect.

The subject of this thesis is Alverata, a twenty-first-century typeface whose design was inspired by the shapes of Romanesque capitals such as those found in inscriptions of the eleventh and twelfth centuries.

Across the early modern Atlantic world, news and information were commodities just as valuable as sugar, tobacco or cotton.

What impact does ethnic profiling and accusations of ethnic profiling have on organisations and the border police officers working at the operational level, and what structural factors on the societal and organisational level contribute to the process of ethnic profiling? Over a period of three years…

Astronomers have discovered an enormous supply of cold molecular gas in a galaxy shortly after the Big Bang. The finding offers a rare glimpse of the raw material from which the first large galaxies were built. Measurements suggest that around 95 per cent of the normal matter in the galaxy studied,…

After a long night of partying, hundreds of people head to Leiden’s Van der Werfpark early on 3 October for a good singsong. Lecturer in Dutch literature Olga van Marion helped compile the new songbook for the occasion. Which songs were left out and which new hits have taken their place?

Many galaxy clusters exhibit bright diffuse radio emission that traces the underlying structure of the intracluster medium (ICM).

The basic concern that informs every part of the research is in wonder of what happens when sound happens as an aesthetic force. The emphasis of each query lies on the active occasion, the radical empiricism, the moment of encounter, how the sonic event comes to pass as aesthetic force.

The database is created by the Centre for Public Values and Ethics of the Institute of Public Administration. Its aim is to collect and describe scandals involving (supposed) corruption and lacking integrity of public officials in the Netherlands between 1945 and the present.

This research paper seeks to examine the nature of the nexus between right-wing extremism and the military by surveying five potential consequences (i.e., problem areas) arising from the presence of right-wing extremists within the armed forces of twelve Western countries.

A scientific assessment of the site selection for the ‘Frontiers of the Roman Empire’ Unesco World Heritage Site.

Madeleine Hosli, Professor of International Relations at Leiden University, together with two other authors, wrote a chapter in Group Politics in UN Multilateralism. This chapter assesses the composition and functioning of the African Union (AU) within the United Nations.

A comprehensive analysis of the state of play, the design of monitoring mechanisms, and creation of a toolbox of support measures.

On 23 April, Rowie Stolk defended the thesis 'Interest group litigation in the Dutch polder: An interdisciplinary perspective on access to the courts'. The doctoral research was supervised by Ymre Schuurmans and Jerfi Uzman.

On 9 October, Corné Smit defended his doctoral thesis, 'Minority governments in the Netherlands and Denmark '. The PhD research was supervised by Luc Verheij and Geerten Boogaard.

What influence do children’s upbringing and education have on their world view? This is the question Professor Judi Mesman is trying to answer. For her research and public outreach activities, she has just been awarded the prestigious Stevin Prize, the highest award in the Netherlands for a researcher…

Jan Zaanen, Professor in Theoretical Physics of condensed material, has been awarded a Spinoza prize. His pioneering ideas about the collective behaviour of quantum particles and high temperature superconductivity have often given him the reputation of being something of a rebel.

The magazine New Scientist selected 25 nominees from candidates proposed by all Dutch and Belgian universities for the New Scientist Science talent 2015 election. One of these nominees is dr. Marieke Liem, who works at the Centre for Terrorism & Counterterrorism.

Political scientists study topics that affect society, but their work often remains out of the spotlight. Not always: the research of Leiden political scientist Simon Otjes does have a visible impact.

During the New Year's Reception at FSW, new Dean Sarah de Rijcke gave her maiden speech. The first official moment at which she's able to share what she stands for and what to expect of her. In case you weren't there, or you want to read the speech at your own pace, below you can find the integral copy…

The court has dismissed Ratko Mladić’s appeal and upheld his life sentence for genocide and war crimes. The verdict is one of Yugoslavia tribunal’s last. Mission accomplished?

Finally we know for sure that there is a black hole at the centre of our own galaxy. Today, astronomers unveiled the first ever photo of Sagittarius A*, a super-massive object at the centre of the Milky Way. This picture could only be taken thanks to the cooperation of telescopes worldwide.

‘Even at the deepest point in the ocean you can still hear the noise from boats,' says biologist Hans Slabbekoorn. ‘And that's while sound is the most important means of communication for underwater life.' What is the effect of all that underwater noise on fish and other animals? Slabbekoorn is on board…

Political scientists study topics that affect society, but their work often remains out of the spotlight. Not always: the research of Leiden political scientist Simon Otjes does have a visible impact.

A better understanding of Morocco and the Arab world is crucial for international relations and for Dutch society. This was the key message of Minister of Education, Culture and Science Jet Bussemaker and Ahmed Aboutaleb, Mayor of Rotterdam, at the opening of the renewed Netherlands Institute in Morocco…

Historian Joost Welten has written a book entitled 'De vergeten prinsessen van Thorn' (The forgotten princesses of Thorn). For his book, he analysed thousands of handwritten letters from the eighteenth century, mainly written in German and French. His personal mission is to visualize the daily lives…

Only the fittest cyclists stand a chance of taking yellow in the brutal Tour de France. Team Jumbo-Visma is working with data scientists from Leiden. They have analysed the stages and performance of Jumbo-Visma’s riders in previous Grand Tours. And they are researching how to determine the fitness level…

The Dutch high-tech industry urgently needs specialised technicians. Leiden University aims to help meet this demand with its new specialisation in High-Tech Innovation (HTI), which brings together chemistry, physics, mathematics, computer science, astronomy and project management.

Advanced LL.M. European and International Human Rights Law and LL.M. European Law students are semi-finalists in the final round of the Helga Pedersen Moot Court Competition in Strasbourg, following their victory in the regional round in Athens.

Parasitic worms and stomach bacteria suppress immune reactions such as allergic responses. Parasitologist Hermelijn Smits and lung specialist Christian Taube from the LUMC are trying to learn from these micro-organisms.

This project explored the role of material culture, in casu painted plaster and its technologies, in expressing dynamic social identities and in forging complex interwoven human relationships in the context of the Middle to Late Bronze Age of the Aegean and East Mediterranean.