Valérie Pattyn, Assistant Professor at Leiden University, researched

This research paper was requested by the European Parliament's Committee on Civil Liberties, Justice and Home Affairs. It was published by the International Centre for Counter-Terrorism (ICCT) in The Hague. Leiden University is one of the participating institutes in this publication and our researcher…

From Dutch Prime Minister Rob Jetten to American ambassador Joseph Poplo, and from former defence minister Kajsa Ollongren to General Onno Eichelsheim, prominent figures attended the first Next Gen Security Conference in The Hague. ‘The Netherlands and Europe must take more responsibility for their…

Both Europe and Latin America face challenges globally and at home. Conflicts over land and resources have been resurgent in recent years.

We aim to unravel the complex and intertwining regulatory systems that control development and antibiotic production in streptomycetes.

This paper develops a novel theoretical framework for the conduct of postmortems after major foreign policy surprises for the European Union and its member states.

Effective policy-making requires understanding what truly causes a problem. Only then can policymakers develop targeted interventions that achieve desired outcomes.

Knowledge security is essential to safeguard our intellectual assets, maintain trust with partners, and comply with legal and ethical standards.

Leiden experts research ways in which European legislation is converted into national legislation. Knowing how this process works can inspire policy-makers trying to achieve their aims while abiding to Europan legislation.

What began as a successful informal collaboration is now being placed on a structural footing. Through a new covenant, the Student Police Advisory Network (SPAN) and ISGA’s Policing Studies team have agreed to continue sharing knowledge, networks and activities around police science.

After an initial suggestion of a move toward Israel, India’s Prime Minister Modi has signaled a significant recalibration of his government’s engagement with the Middle East region. Now, India seems to be prioritising strong ties with the Gulf states.

This thesis develops statistical methods for the analysis of high dimensional data: high dimensional networks reconstruction (Chapters 1-4), incorporation of prior information in networks reconstruction (Chapters 2-4), incorporation of prior knowledge in genetic association studies (Chapter 3).

This project aims to situate the current policy concept of ‘valorization of scientific knowledge’ in historical and epistemological perspectives. Conceptual understanding of the utility of scientific practices is developed in dialogue with historical analyses of the politics of knowledge in European…

As part of the Paris Agreement, countries across the world agreed to support developing countries to invest in climate mitigation and adaptation through a Green Climate Fund. However, developed countries have failed to meet funding commitments for the Green Climate Fund–the flagship program financing…

Conventional food supplies procured from rural areas are increasingly vulnerable to disruptions caused by extreme weather, geopolitical instability, and logistical bottlenecks.

On 29 and 30 June, Ingrid Leijten participated in an international workshop held at the International Institute for the Sociology of Law (IISJ) in Oñati, Spain.

Researchers of the Leiden Leadership Centre are active members of the PUPOL network. PUPOL is an international academic network for public and political leadership which fosters exchange of ideas and inspires collaborative research among scholars focusing on the role of leadership in the public and…

Has there been continuity or change in US counterterrorism policy since 9/11? What factors led to the continuity or change, and how do we classify any such continuity or change?

On behalf of the interdisciplinary programme Social Resilience & Security, we would like to remind you of the call for proposals for seed funding (up to €4.000) to boost interdisciplinary research.

Promotor: H.J. van den Herik, B.R. Katzy, Co-promotor: K. Sailer

Curious about how sustainability fits into our university's strategic plan, or how much energy and water we consume? Read about it here.

We study the structure, dynamics and physics of complex networks emerging from the intricate interconnectedness of the constituents of large systems.

A research data infrastructure in computational social science

2 joint initiatives began in 2019 which attempt to connect the various efforts around active learning at Leiden University: the active learning network, and the Saltswat project.

This project develops methods for ensuring the anonymity of individuals in social network data.

Dementia is a progressive disease, diagnosed at a relatively late stage when intervention may not be effective. Aim of the research is to study scans of brain networks to help discover the early network changes related to dementia. Early diagnosis may benefit effectiveness of future treatment.

He announced this news in a tweet earlier this month: 'Delighted to announce that I've been appointed Full Professor of Global Security and Technology'. So let's get more closely acquainted with Dennis Broeders (46), who explains why the Institute of Security and Global Affairs (ISGA) is ideal for him,…

Konstantinos Zoumpoulakis, Research Assistant at the Institute of Criminal Law & Criminology, has written a report on this conference

Promotor: E.F.A. Deprettere, Co-Promotor: A.C.J. Kienhuis

Thanks to data science, we can chart and search enormous quantities of related information. This generates all kinds of new insights, for example in complex global financial structures or such societal problems as loneliness.

Who tried to influence the mission and position of the Dutch security services between 1912 and 1992, what effect did that have on the form and contents of the security services? How to account for transformations of the security services?

A story of Two Mosuls, The Resurrection of the Iraqi Armed Forces and the military defeat of ISIS. In this article, published in the Journal of Strategic Studies, the authors Maarten Broekhof, Martijn Kitzen and Frans Osinga discuss the military adaptation by the Iraqi armed forces and their role in…

This thesis explores Breaking of Ensemble Equivalence (BEE) in random graph models by examining the spectral properties of adjacency matrices. The goal is to identify spectral characteristics that differentiate random graph ensembles, enhancing the understanding of complex network structures and beh…

This thesis describes the design, characterization and application of dextran based crosslinked network.

The amended Intelligence and Security Services Act (WiV) enacts a fundamental change in the relationship between the security services and politics. This carries the risk of politicisation of information, according to Professor Paul Abels. Inaugural lecture on 16 February.

To answer questions that look beyond individual entities, network science studies the interactions taking place in complex systems. These complex systems can often have temporal information on when an interaction occurs.

Gendered dynamics and assumptions are prevalent throughout the field of cybersecurity.

A Diachronic Perspective on the Aegean

EUMOTIONS explores the role of emotions expressed by political elites (at EU- and member state-level) in framing the EU’s policy options during international crises.

Great apes and the right to health

Promotor: F. Arbab, R. De Nicola, Co-Promotor: M. Tribastone

This project is part of a broader research agenda aiming to better understand the relationships between the development of contemporary security concerns and the evolution of forms of security cooperation and crisis governance.