The proportion of children who are overweight has increased enormously over the past 20 years. The number has currently stabilised but even so there are still too many overweight and obese children. Could there be some connection with the way they are brought up? Roxanna Camfferman's PhD research shows…

My research project aims to analyze reasons of the European Union’s (EU) inadequacy to develop a strong Common Security and Defense Policy (CSDP) with regard to the role of main EU member states, namely Germany and the United Kingdom (UK) and find the answer of how the EU overcome the CSDP question…

Fundamental research in the ALgebra, Geometry And Number Theory

The times between the Neolithic and Urban revolutions in Mesopotamia have for a long time been interpreted as a period of stagnation. This volume is part of an emerging discourse that challenges such assumptions.

The Leiden Institute of Advanced Computer Science (LIACS) of Leiden University proudly establishes the Blaise Pascal chair. The chair applies for one year and is meant to strengthen the cooperation of the Leiden computer science research with foreign institutes.

Promotor: Peter Stevenhagen

This book is the first comprehensive presentation of the archaeology of Syria from the end of the Paleolithic period to 300 BC.

Special Issue in: Visual Anthropology, Volume 29, Issue 3, 2016

In this project, researchers and lecturers from LUCAS, ICLON and UBL join forces to publish expertise and experience in the field of machine learning and AI as open learning materials for secondary education.

Vol. V, Sections 1-2

Promotor: Peter Stevenhagen

This thesis has three main parts. The first part gives an algorithm to compute Hilbert modular polynomials for ordinary abelian varieties with maximal real multiplication. Hilbert modular polynomials of a given level b give a way of finding all of the abelian varieties that are b-isogeneous to any given…

In this dissertation several settings in the Online Learning framework are studied. The first chapter serves as an introduction to the relevant settings in Online Learning and in the subsequent chapters new results and insights are given for both full-information and bandit information settings.

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.

Clinical psychologist Bernet Elzinga has been appointed as Professor of a personal chair at the Faculty of Social and Behavioural Sciences. This professorship will contribute both nationally and internationally to the broader promotion of Leiden University in the field of stress and psychopathology.

Emotions play a key role in EU politics. This article examines how emotions influence the EU’s response to international crises and norm violations.

Currently the focus of the project is the development of a tool that utilizes dimensionality reduction techniques in order to analyze and interpret the lexical and phonological variation between different sign languages. Additionally, the application of deep learning techniques for the extraction of…

Inaugural address of Prof.dr.ir. Peter van Bodegom

Practical advice, a panel discussion, and an informal networking reception: students and alumni from the MA International Relations can look back on yet another successful event last April. The diverse backgrounds and careers of the alumni vividly illustrated the range of opportunities awaiting students…

Vivian Ng came back to Leiden last June to finally sign the walls of the Sweat Room. Graduated in 2020 during the pandemic, she missed out on this wonderful tradition, like so many others. While enjoying a day off in Leiden, we talked about her time as a student and her current job.

The norms, institutions and power relations that have defined the last decades of international political and economic relations in the European Union are undergoing major transformations. With the return of competition between great and ambitious powers, like the US, China, EU and Russia, the need…

Leiden University’s Institute of Political Science is looking for four assistant professors in International Relations. Application deadline: 1 March 2017.

Consumer societies are a global presence, and marketing practices have spread to all corners of the world. However, the loud and glaring performances of the big advertising companies and the hegemony of shopping malls makes us forget that there are many different markets, and many merchants who have…

Tell Sabi Abyad is a major Late Neolithic settlement mound in Northern Syria, belonging to the seventh and early sixth millennium bc. This book presents the results of large-scale fieldwork conducted at the site between 1994 and 1999, under the auspices of the Netherlands National Museum of Antiquities…

Essays dedicated to Frans Wiggermann

The experimental approach of science applied to artistic research

Just published: Nederlands internationaal privaatrecht Special issue: Private international law and finance

Essays in Archaeology and Assyriology Dedicated to Diederik J.W. Meijer in Honour of his 65th Birthday

Practical applications for the reconstruction of the past

Childhood sexual abuse is a common problem, with approximately one in five girls and one in 13 boys worldwide experiencing some form of sexual abuse before the age of 18. Despite its high prevalence, many individuals remain silent about these experiences, often delaying disclosure for years, with one…

The wide-ranging interests of the Dutch archeologist Maurits van Loon -prehistory, art history, and ancient history - are reflected in these papers, which commemorate his 30 years of archeological research in the Near East

This publication is written in Dutch. Please consult the Dutch page for more information.

It is often said that the true character of a person is only revealed in a crisis. In these days, the coronavirus causes concern about the true state of the multilateral system. Political scientist Gisela Hirschmann (Leiden University) is worried about the future of multilateralism.

The coronacrisis makes painfully clear that a transboundary crisis requires a transboundary response. The European Union could play a key role, but that has not happened so far. Political scientist Amy Verdun (Leiden University) explains why.

How can pre-Islamic poetry be used as a source to reconstruct the history of central Arabia at the dawn of Islam?

In our rapidly evolving and interconnected world, the study of International Relations has expanded beyond conventional disciplinary boundaries. Leiden University’s MAIR program, with its emphasis on humanities-oriented and multidisciplinary perspectives, contends that understanding the complexities…

On 11 June 2025, the MA in International Relations (MAIR) Programme convened its 2nd Humanities & IR Graduate Conference at The Hague Campus (Schouwburgstraat), welcoming over sixty participants from twenty institutions in Europe, North America, and Asia.

Promotor: P. Stevenhagen, Co-promotor: R.M. van Luijk

This dissertation studies the construction of Franklin Delano Roosevelt as a cultural icon in American memory, particularly by FDR himself.

Skandapurāṇa IV presents a critical edition of Adhyāyas 70-95 from the Skandapurāṇa , with an introduction and annotated English synopsis.

Promotor: Prof.dr. P. Stevenhagen, Co-Promotor: Dr. J.H. Evertse

The Passion in Profession series features researchers who are specialised in Islamic, Middle Eastern and Central Asian studies. With the series, LUCIS aims to show what inspires them in their work by highlighting an object or concept that they feel passionate about.

This thesis consists of three chapters, the first two of which concern division points of elements of the multiplicative group of a number field.

Traditional hypothesis testing requires researchers to set a fixed sample size in advance. After collecting data, the test determines whether to reject the null hypothesis.