Latest technological developments in data mining and profiling.

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…

D2.2 comprises the in-depth legal analysis of the initial heuristic model, focused on addressing, in more detail, the main legal concerns for data reusers in the European data economy. This detailed analysis of the legal propositions presented in D2.1 is supplemented by an analysis of the technological,…

D1.2 reports on the findings of an analysis of framework conditions relevant in the context of the data economy from a legal, a socio-economic and a technological perspective. The analysis is a key foundation for the creation of an initial, heuristic model of the European data economy. The deliverable…

'De gelukkige piekeraar' is a book by Bart Verkuil about the power of worrying. It is a practical guide on a good relationship with your worrying thoughts.

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…

D1.3 describes a set of five case studies relevant in the context of the EuDEco project. Case studies are considered relevant if they are initiatives focusing on the promotion of big data and data reuse or pilots facilitating data reuse in one form or the other. The case studies were expected to allow…

Inaugural lecture

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.

Explore philosophical research and education at the Leiden Institute for Philosophy. Our scholars study knowledge, ethics and existence, connecting classical and contemporary thought.

How does the development of digital technologies impact society, and law/regulation within that society?

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 territories that would make up what is today the Republic of Zambia officially became British in 1891. However, this did not equate to an on-the-ground presence of colonial authority capable of affecting the destiny and daily lives of people.

The deans (chairs of the faculty boards) form the Board of Deans, which is chaired by the Rector Magnificus.

With the growth of cybercrime in recent years, there is an urgency to gain insight into the money laundering process and the actors involved. This study focusses on the money laundering process and maps the actors involved in banking malware and ransomware.

Promotor: H.W. Lenstra, Jr., Co-promotor: B. de Smit

This research project explores themes related to the system of close protection and surveillance (Dutch: bewaken en beveiligen) in the Netherlands.

As of 1 November 2025, Professor Luc Sels will assume the role of President of Leiden University’s Executive Board.

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

LUCIS works with Science ON AIR to put its researchers in the spotlight. For that purpose, several online videos of LUCIS members have been produced.

In November, Springer published a book on The Future of Drone Use, edited by dr. Bart Custers, associate professor at eLaw, the Center for Law and Digital Technologies of Leiden University.

Astronomer and Marxist Anton Pannekoek was a remarkable figure. This book aims to study the connections between his life as a socialist theorist and as a pioneering scientist through the prism of Pannekoek's biography.

Contact details and staff overview of the Leiden University Graduate School of Social and Behavioural Sciences.

Acquiring and maintaining public support is frequently cited as an important requirement for governments fighting non-state actors. But how exactly can public support influence the course of counterterrorism campaigns and thereby contribute to an escalation or de-escalation of violence?

On 23 January 2020, Paula Kemp defended her thesis 'Enforced performance of commercial sales contracts in the Netherlands, Singapore and China'. The doctoral research was supervised by Prof. H.B. Krans and Prof. M.H. Wissink (RU Groningen).

Vice-chairman of the Executive Board Martijn Ridderbos will leave Leiden University at the end of this year.

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…

Timo Kos has been appointed Vice President of Leiden University’s Executive Board and will take up the role on 1 March 2025. He succeeds Martijn Ridderbos, who will join the board of the Netherlands Authority for Consumers and Markets (ACM) on 1 January 2025.

With the new academic year just around the corner, many more students and lecturers will soon be coming to the University. What are we doing to keep our campus safe? We spoke to Martijn Ridderbos, Vice-Chairman of the Executive Board, about the new Campus Protocol, which enters into force on 31 August.…

Women in International Security -Netherlands (WIIS-NL) is an affiliate of WIIS Global. WIIS-NL Members include: professionals, civil servants, academics, NGOs, employees of international bodies and organizations, embassy staff, politicians, students, and interested members of the general public. The…

Nick Cohen interviews Andrew Gawthorpe about the current geopolitical situation, particularly focusing on America's disastrous war with Iran and its broader implications.

The Editors of PAIR are always interested in suggestions for themed editions. Anyone wishing to propose a theme and/or to assist as a ‘guest editor’ should contact one of the editors of PAIR.

Can excessive worrying be reduced via stimulation of the vagus nerve?

Lange tijd wisten we ons thuis in een wereld die we meenden te hebben. Het bestaan in deze vertrouwde wereld vormde onze existentie, die we op een eigenlijke wijze op ons namen. Thans is de wereld echter niet meer wat hij was, en zijn we ook zelf niet meer wie we waren. ‘De wereld is weg’, zo dichtte…

Philosophy of law is concerned with the the foundations of law.

Who were the main artists and producers who generated new forms of popular music? What was the music like that was produced by artists in particular urban settings? How were particular lifestyles articulated to identify new audiences and what does this reveal about the way popular music contributed…

By making two final network connections and entering a command, Martijn Ridderbos (Deputy Chairman of the Executive Board) , Geert de Snoo (Dean of the Faculty of Science) and Bart Hoogervorst (Head of Department Operations ICT Shared Service Centre) ceremonially booted up the university’s latest supercomputer,…

Digitalisation to achieve sustainable (administrative) justice.

Why are people sometimes unable to change, even if they want to? Why is it so difficult to change political institutions, or to abandon outdated ways of thinking? This book suggests that we can understand the phenomenon of resistance to change in individuals and institutions by returning to Hegel, one…

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…

The profile area Political Legitimacy brings together researchers from multiple research institutes within Leiden University.

Schuurman examines how Russia is escalating its covert operations against European countries.

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…

The second and final report on the Netherlands‘ crime-terror nexus has analysed all fourteen profiles of individuals arrested in 2015 for offences of terrorism.

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

This thesis concerns the relation bettween the good reduction of Shimura varieties and the associated loop groups.

On 20 May 2022, eLaw - Center for Law and Digital Technologies of Leiden University organised the Hans Franken lecture for the third time. This year the lecture was delivered by Aleid Wolfsen, chairman of the Autoriteit Persoonsgegevens (Data Protection Authority (DPA)), the privacy watchdog of the…