The Research Group 'Violence and Violence Prevention' studies interpersonal violence. We seek to better understand the dynamics underlying interpersonal conflict.

Research on lethal violence related to criminal activities.

What is the nature and scope of violence? Who offends, and in what context? Who are the victims? And how can we design suitable intervention and prevention strategies? In this track, you will be familiarised with the many faces of violent offending, to provide the knowledge and tools to understand,…

Firearms and violence in Europe–A systematic review by Katharina Krüsselmann, Pauline Aarten, Marieke Liem

How many men and women die per year at the hands of others? What are the motives behind these killings? Are there as many homicides today as years ago? How can we explain the rise and fall of homicides over time? And: What is the influence of (early) childhood and adolescence on the likelihood to commit…

Under what circumstances do paramilitary groups limit their use of political violence? This article examines the use of political violence by the PIRA.

In this minor programme, students will become familiar with the nature and scope of violence; the ways in which it impacts public order, and the ways in which society can respond to and, ultimately, prevent violence.

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

Project TARGET aims to improve our understanding of gun violence in Europe and the relationship between gun violence and firearms trafficking.

In this project, we seek to assess, map and understand the risk factors associated with fatal domestic violence.

Can conspiracy constructions explain for hatred of the system? And if so, should conspiracy constructions be considered to be a risk in terms of national security?

Representations of violence are often said to generate cathartic effects, but what does “catharsis” mean? And what theory of the unconscious made this concept so popular that it reaches from classical antiquity to the digital age?

The judge as a problem-solver in domestic violence cases involving child victims.

This doctoral thesis comprises four studies on the content and structure of physics teachers’ belief systems about teaching and learning physics in secondary education in the Netherlands.

This study focuses on violence involving juveniles in conflict with the law who are deprived of their liberty in different institutions within the framework of the (juvenile) criminal justice system (inter alia, police detention, pre-trial detention and deprivation of liberty after conviction or sen…

The aim of this project is to study what makes an act or form of violence a specifically political reality.

This article describes the phenomenon of firearms violence and the importance of including non-lethal firearms violence in understanding this phenomenon.

The illegal use of hand grenades has generated a lot of public interest over the last few years but very little is known about the nature and extent of these incidents. This research project is trying to fill that gap.

The position of child victims, globally and in Liberia and their right to physical and psychological recovery and social reintegration covered by art. 39 CRC.

To assess the impact of illicit firearms trafficking on gun violence, this research looks at the scope, characteristics and contexts of firearm violence, and also the scope and nature of firearms trafficking in Europe since the new millennium. Nils Duquet, Dennis Vanden Auweele and Marieke Liem created…

In the spirit of 'unity in diversity', our objective is to promote insight into and appreciation for the wonder that the same physical laws and mathematical concepts apply to the whole of nature, from the largest to the smallest energy and length scales. We strive for the application of abstract theoretical…

Are you thinking about studying Physics? Learn more and watch the introduction video.

PhD candidates carry out a programme of independent research and additional (limited) course work, culminating in production of a PhD thesis in typically 4 years.

On 29 September 2020, Tom van Ham defended his thesis 'Collective violence offenders and offending. The role of individual characteristics'. The doctoral research was supervised by Prof. A.A.J. Blokland, Prof. O.M.J. Adang (RUG) and Prof. Th.A.H. Doreleijers (VUMC).

On Tuesday 23 May 2017, Jasmina Mackic defended her doctoral thesis ‘Proving discriminatory violence at the European Court of Human Rights’. The supervisor of the research is Vice Dean and Professor of Public International Law Larissa van den Herik. A brief summary of her thesis is provided below.

The master’s programme Physics at Leiden University offers a wide range of specialisations from theoretical research to cosmology. You will be trained for a career in research or for a more practical-oriented specialisation. The programme offers a wide choice of individual study paths that take into…

Studying Physics is an exciting journey through the foundations of nature: from the infinitesimal (particle physics) to the grandest scale (cosmology). Physics is a varied study programme that provides a solid foundation in theory and experimentation, with attention devoted to their practical applic…

Representations of violence have subliminal contagious effects, but what kind of unconscious captures this imperceptible affective dynamic in the digital age?

Leiden has a strong tradition in theoretical physics, thoroughly linked with experimental disciplines.

Examining mediation and moderation.

The physics of black holes appears to be as far removed from the physics of electrons in metals as it can be.

Are you thinking about studying Crisis and Security Management: Governance of Violence? Learn more and watch the videos.

French title: Communication et violences dans le Guéra et le Moyen-Chari (Tchad) de 1940 à 2010. This research investigates the relationship between the introduction of new means of communication and violence experienced by the local populations in the Moyen-Chari and the Guéra regions in Chad from…

How can we stay fit during hybrid working?

This article written by Marieke Liem & Alexander Kamprad investigates the relationship between terrorism and interpersonal violence. They conducted cross-national analyses on the effects of terrorism mortality rates on homicide rates. Results showed that terrorism appears to be robustly and positively…

The Physics and Biological and Soft Matter master's specialisation is one of the two programmes that Leiden University offers in experimental physics. This programme mainly focuses on Biological Physics and Soft Matters Physics.

The master’s specialisation Physics and Education at Leiden University prepares you to teach the subject of physics to secondary school students. The programme comprises a one-year physics component, followed by an education component in the second year.

The Physics master’s programme offers you a research intensive and tailor-made study path on current topics in experimental and theoretical physics at an institute of international renown. We offer five research specialisations, with emphasis on either experimental or theoretical physics, which train…

The Physics master’s programme offers you a research intensive and tailor-made study path on current topics in experimental and theoretical physics at an institute of international renown. We offer five research specialisations, with emphasis on either experimental or theoretical physics, which train…

This research examines the social, political, and cultural forces that structure people’s responses towards accented speech, and further uses the accent as a focal point to theorize the interrelation between language and body.

This is the physics summer school of Leiden University. It is part of the Leiden Institute of Physics (LION). The summer school is intended for Bachelor (BSc) students in physics. It covers topics from quantum matter and optics, to biological & soft matter physics and cosmology and theoretical physics.…

Physicists at the Leiden Institute of Physics (LION) conduct fundamental research into physical phenomena. They are inspired by curiosity and the desire to know more about the world in which we live. This research has always paved the way for new practical applications. These are something that the…

Research groups in the Biological & Soft Matter Programme unravel mechanisms in biological processes and develop novel bio-inspired soft materials.

The master’s specialisation Research in Theoretical Physics prepares you for a PhD position in theoretical physics. The research entails a broad range of topics including High Energy Physics and Particle Cosmology, Theoretical Physics of Life Processes and Condensed Matter Theory.

The master’s specialisation Physics and Science Based Business at Leiden University bridges science and business development by focusing on areas such as technology management, innovation, entrepeneurship, operations, and decision making.

Persistent somatic symptoms are long term symptoms that lack a clear medical explanation. These symptoms have a high prevalence where most people know someone who experiences such symptoms or they experience such symptoms themselves. Symptoms can vary greatly in and between people. While one person…

Research at the Leiden Institute of Physics (LION) is foundational and curiosity driven. All our scientists share a desire to increase the knowledge of the world around us, in an open atmosphere of inquiry from which innovative ideas emerge that provide applications and value for society.

The central inquiry of this thesis revolves around how ontology can adequately accommodate the existence of necessary physical relations. Initially, the thesis demonstrates the imperative acknowledgment of necessary physical relations by showcasing the failure of Neo-Humean theories.