Emeritus professor at the Natural Products Laboratory, Institute of Biology, Leiden University - the Netherlands

A selection of news from Leiden University.

In his leaving interview, Martijn Ridderbos doesn’t have to think long when asked what he is most proud of. ‘Bringing people together; creating things together. Reducing the gap between researchers and the staff who support them because the latter are essential. We’ve achieved that and the seeds have…

This project sets out to map, document and analyze instances of squatting in Leiden from 1970 to 1990, in order to set up an online Digital Archive of Squatting in Leiden. This archive will function as an online resource for academic research, as well as a starting point for public activities such as…

Polarisation in our society is on the rise. What makes people increasingly radical? How do we protect ourselves from extremist, terrorist or criminal threats, be they physical or in the cyber world? And what role do intelligence services play in this?

The Faculty of Science is located at the Leiden Bio Science Park. It was founded more than two centuries ago and currently, more than 8000 people are working and studying at the eight institutes.

Understanding the evolving landscape of extremism in the 21st century.

Do you wish to contact us for further information on the collaboration between Leiden University and Indonesia?

Southeast Asia is a term to denote a collection of at present eleven nation-states with an enormous diversity in languages, cultures and religions. Muslims can both take a majority and a minority position.

Historiography of science is in its current self-image a non-evaluative discipline. Its main goal is to understand past processes of knowledge formation on their own terms. In the last few decades this approach has greatly improved our understanding of the phenomenon of science. Yet, something strange…

This timely and engaging book examines the rise of populism across the globe. Combining insights from linguistics, argumentation theory, rhetoric, legal theory and political theory it offers a fully integrated characterization of the form and content of populist discourse.

In recent years, the use of primary data in terrorism research has increased. In order to maximise the benefits of this trend, we want to encourage terrorism scholars to implement open science practices more systematically. This article therefore presents different avenues towards open and reproducible…

This article presents an in-depth evaluation of a specialized reintegration initiative within the Dutch Probation Service focused on individuals convicted or suspected of involvement in terrorism.

LUCIS is directed by Nathal Dessing, who is advised by a steering committee.

Promotores: A.P. IJzerman, H.W.T. van Vlijmen

This article provides an in‐depth assessment of lone actor terrorists’ attack planning and preparation.

In 2012, the Dutch National Coordinator for Security and Counterterrorism and the Dutch Probation Service launched a reintegration project for offenders on probation or parole who were (suspected to be) involved in jihadist extremism or terrorism. The initiative's primary goal was to reduce the chance…

This paper contributes on an increasing body of work on radicalisation. It specifically focuses on what distinguishes individuals whose behavioural radicalisation includes involvement in terrorist violence from those whose behavioural radicalisation does not.

e-SIDES (ethical and societal impact of data sciences) is a Coordination & Support Action (CSA) part of the Horizon 2020 programme.

In the last two decades, there have been heated public and scholarly debates in France, the United Kingdom, and the Netherlands on the violent end of empire. Nevertheless, the broader comparative investigations into colonial counterinsurgency tend to leave atrocities such as torture, execution, and…

Artful Mathematics: The Heritage of M. C. Escher

Feedback from fellow students on academic writing is as informative as that of teachers.

The Hazelhoff Centre for Financial Law provides academic teaching and performs research in the field of financial law.

The authors in this volume explore how external innovations (products, technologies, services, institutions and processes) have been appropriated in African societies in order to be acceptable and relevant to local conditions, expectations and demands.

The Turn of the Soul: Representations of Religious Conversion in Early Modern Art and Literature

Pottery traditions and social interaction in the earliest Neolithic of the Lower Rhine Area

Unfolding potential

This research note argues that the “lone wolf” typology should be fundamentally reconsidered.

The book addresses the question “How and why do people become involved in European homegrown jihadism?

Southern Africa has a rich tradition of social history, one inspired by the tumultuous changes that have regularly convulsed the region from the 1780s onwards. Scholars have always sought to understand what these changes meant for everyday life and emphasised a perspective of marginal groups, how these…

Each year, the Leiden University Student Platform (LUS) presents the Leiden Education Prize.

The Faculty of Social and Behavioural Sciences (FSW) offers an inspiring and competitive, international working and learning environment to around 1,025 staff and around 7,000 students from home and abroad on 13 bachelor's, master's and research master's programmes.

On 23 April, Andreas Häuselmann defended the thesis 'EU privacy and data protection law applied to AI: unveiling the legal problems for individuals'. The doctoral research was supervised by Gerrit-Jan Zwenne and Bart Custers.

This article introduces the special issue on ‘Digital Activism’ by exploring some of the trends in social media activism and scholarship thereof. The authors ask to what extent this literature helps us understand Asian forms of online activism, which forms of activism have relatively done well, and…

Announcement of the publication of Vamping the Stage: Female Voices of Asian Modernities, the first book-length study of women, modernity, and popular music in Asia (University of Hawai'i Press, 2017).

Much has been said regarding the global flows of information that are characteristic of modernity; it has been frequently stressed that these conduits are so deeply embedded that local or national environments may be imagined as having a global span. Thus, while we are now well aware that the imagination…

At the initiative and expense of His Royal Highness King Willem-Alexander, Leiden University will be conducting a study of the role of the House of Orange-Nassau in Dutch colonial history. The project will run from 2023 to 2026.

If gifted children are experts in using strategies, why do they experience problems with learning? Why do they underachieve?

Cyber agent technology and intelligence agencies is a project that is commissioned by Tracks Inspector, a Dutch company that develops innovative software.

LUCIS promotes high-quality research on Islam and Muslim societies and actively communicates the insights and findings of that research to the larger public.

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.

Valérie Pattyn, Assistant Professor at Leiden University, researched

Squatters and autonomous movements have been in the forefront of radical politics in Europe for nearly a half-century—from struggles against urban renewal and gentrification, to large-scale peace and environmental campaigns, to spearheading the antiausterity protests sweeping the continent.

On 27 May, Dimitra Stefoudi defended the thesis 'Legal and policy aspects of space big data: legal implications of the use of large amounts of space data – regulatory solutions and policy recommendations'. The doctoral research was supervised by Steven Truxal and Bart Custers.

On 7 May, Aleksandre Zardiashvili defended the thesis 'Power and dignity: the ends of online behavioral advertising in the European Union'. The doctoral research was supervised by Bart Custers and Simone van der Hof.

Examining mediation and moderation.

Information about the situation in Ukraine

This year Leiden University exists for 444 years! This will be celebrated together with the residents of Leiden and The Hague during various activities. One of these is scientists and residents doing research on plastics and psychology together.

Leiden University has a new Executive Board. Since 8 February 2021, Annetje Ottow has been the new President and Hester Bijl the new Rector Magnificus of the Board, while Martijn Ridderbos has continued in his role as Vice-Chairman.