The research of the Mathematical Institute is driven by the curiosity of its members and has many internal and external connections. It can be characterised as fundamental but with an open attitude towards applications.

The Institute of Criminal Law and Criminology conducts extensive research on imprisonment. Sending a person to prison is the most severe form of punishment that can be applied in the criminal justice systems of European countries. In most countries, the number of prisoners has risen in recent decades.…

Career and apply for jobs

Career and apply for jobs

Career and apply for jobs

Lecture

Career and apply for jobs

Career and apply for jobs

Lecture

Monica den Boer, who has decades of experience within police and defence and was also active as a Member of Parliament (D66), has been appointed extraordinary professor of Police Studies.

Floske Spieksma will give her inaugural lecture as Professor of Mathematics of Operations Research on 1 September. A discussion about mathematical models, Venezuela, trembling knees, being the only woman, casinos, intuition and above all loving your job.

When you think of migration, you probably won’t immediately think of dating apps. Yet such apps are important to many migrants, such as those who identify as lesbian, gay, bi, trans, queer or questioning (LGBT+). Researcher Andrew DJ Shield studied the role that dating apps play in the migration process,…

Joseph Callingham from the Leiden Observatory receives the Louise Webster Prize for outstanding post-doctoral research. The prize is awarded by the Astronomical Society of Australia for Callingham’s search for the most extreme object in the Universe.

It’s better to cut our nitrogen emissions now than to solve the consequences later at great expense. That’s the lesson we can learn from the Dutch nitrogen crisis, according to nitrogen expert Jan Willem Erisman. In Science, he shares this lesson with other countries. According to Erisman, we should…

Migraine can’t be diagnosed with a blood test, scan or physical examination. Language therefore plays a crucial role in its diagnosis. Neurologist Joost Haan has researched the relationship between language and migraine, and looked at how migraine is described in fiction. His PhD defence is on 22 Oc…

Ton Schumacher, professor by special appointment in Immunotechnology at the LUMC and group leader of Molecular Oncology and Immunology at the Netherlands Cancer Institute, has been awarded the NWO Stevin Prize. The Stevin Prize and the Spinoza Prize are the top scientific prizes in the Netherlands and…

Certain cichlid fish in Lake Victoria seem to have adapted super-fast to changing circumstances. Dr Frans Witte from the Integrative Zoology section has been awarded an NWO subsidy (approx. € 240,000) to carry out PhD research into the rapid changes apparent in this fish species.

Professor Lodewijk Woltjer passed away on 25 August 2019.

Every summer, Leiden University is the setting of dozens of summer schools in which professionals and students can receive extra training on a specific topic within a short space of time. We took a look at a summer programme on extremism. ‘A recruiter for al-Qaeda said that I could change the world.…

What does a political party do in the wake of a disastrous electoral defeat? Martijn van Nijnanten researched this and discovered that parties turn to core values from the past. PhD defence on 12 September.

Seven Leiden professors have been elected as members of the Royal Netherlands Academy of Arts and Sciences (KNAW). In total 23 new members will be inaugurated on Monday 13 September.

Alumnus Stan van Haasteren went to Northern Ireland in 1995 as a freelance journalist with a guitar strapped to his back and recently wrote a book about his experiences in Belfast. ‘The big difference with then is that today there is no more violence. But it's still a divided city.’

Today over 1000 chief executives and more than 40 world leaders meet in the Swiss village Davos to discuss the world's issues of today. What is the importance of the conference and what is the actual effectiveness? Dr. Alexandre Afonso, assistant professor in the Department of Public Administration,…

‘It is a fantastic sum of money,’ enthuses classicist Professor Ineke Sluiter. ‘It gives me not just an award, but a task as well. And in all honesty, I prefer it that way.’ She is already brimming with ideas about what she will do with her Spinoza Prize.

He had been emeritus for 13 years when he suddenly received an email from Poland. Professor of Inorganic Chemistry Jan Reedijk was awarded an honorary doctorate from Nicolaus Copernicus University in Toruń. During the celebration of the 550th anniversary of the birth of patron Nicolaus Copernicus,…

Public funding for fundamental research is essential for innovation and the development of new medicines. This is demonstrated by Professor Science Based Business Simcha Jong and his colleague Hsini Huang after studying US federal funding restrictions for stem cell research under President George W.…

For his PhD, historian and army major Dion Landstra researched the effectiveness of observers in peace operations in the Balkans between 1991 and 1995. What risks are acceptable for bringing about and maintaining peace? Landstra will defend his PhD on 28 September.

Three decades ago, cyber-diplomacy did not exist. The interest in Information and Communication Technology (ICT) as a vector of change in international relations was limited to a few mostly technical organisations, and a restricted number of states.

Audible Absence: Searching for the Site in Sound Production

Different groups can have different memories of the same historical event. This can lead to conflict but does not have to. How is this, and how can countries and people reconcile with the past?

Sinds september 2010 werken Geerten Waling en Anne Heyer in het NWO project ‘The Promise of Organization’.

It's a no-brainer: of the candidates that you can vote for on 23 May, 14 studied at Leiden University. We asked four of them about their motivation and ambitions. In this article we interview Samira Rafaela, alumna of Public Administration, and Caspar Rutten, who is studying Law.

Expats in the Netherlands receive a much warmer reception than other migrants, Leiden University's Aniek Smit has discovered. ‘But municipalities need to pay more attention to the differences between expats and the effects of their presence on other residents.' PhD defence 25 January.

This year four research trainee projects were approved by the faculty to be carried out at the Institute for History this semester.

Princess Beatrix was a guest at the opening of the conference on ‘Chinese Buddhism and the Scholarship of Erik Zürcher’ in Leiden on 12 February. Buddhism researchers from all parts of the world came together to reflect on the work of Leiden sinologist Erik Zürcher.

Theo van den Doel received his PhD in January for his research on veteran support. This showed that for long the government learned little from past missions. He has since presented his dissertation to the Lower House of Representatives, and the Minister for Defence, Kajsa Ollongren, has responded to…

Heritage expert Monique van den Dries has a long history with our Faculty. She did her studies and PhD in Leiden, and before returning to academia in 2008, she worked in heritage management for nearly 15 years. This has, given her a unique insight in the world outside of academia. ‘I want to literally…

Exactly a century ago, astronomers observed the first two diffuse interstellar bands (DIBs) in space. A DIB manifests itself as a colour of light that is missing in the radiation from stars behind an interstellar cloud. Although about 500 DIBs are yet discovered, they remained inexplicable until recently.…

Recently, the so-called refugee crisis has been framed as a threat for well-developed welfare states in Europe by the president of the Eurogroup, Jeroen Dijsselbloem. According to him, external borders have to be guarded, because otherwise ‘loads of people will come to demand support and they blow up…

The world is autocratising. In 2022, a record number of states across all continents, including Europe, was shifting towards autocracy. But against theoretical expectations and common sense, autocratising leaders – known for their nationalist agendas and human rights violations – do not always restrict…

PhD candidate Agnes van Steen researched the history of the Leiden women’s rights movement (1860-1990) and found that the university produced many feminists.

Neanderthals were able to outwit straight-tusked elephants, the largest land mammals of the past few million years. Leiden professor Wil Roebroeks has published an article about this together with his German colleague Sabine Gaudzinski-Windheuser in the Science Advances journal.

Starting 2 July 2022, a new exhibition will be opened to the public at the Old Observatory: More-than-Planet. This exhibit asks the question: how do we imagine our planet?

Seger Kersbergen studied the Cabo Verdean nightlife in Rotterdam. He explains how their music describes their nightlife and daily lives.

New housing in old labs and striking architecture for University buildings and high-tech companies, not to mention waterside parks. An exhibition in Oude UB shows the radical changes that are in store for the Leiden Bio Science Park over the coming years.

On Thursday 15 April, Sabine Mengelberg, associate professor at the Faculty of Military Sciences of the Netherlands Defence Academy (NLDA), will defend her thesis on changes in European security architecture. Permanent Change? The Paths of Change of the European Security Organizations is the title of…

Since 2009-2010, the West viewed China as more assertive. Especially after Xi Jinping came to power in 2012, the country abandoned Deng Xiaoping’s ‘low profile’ foreign policy. Friso Stevens explains in his dissertation where this change has come from. The dissertation defence is on 28 March.

In Montreal, the 34th Meeting of Parties on the Montreal Protocol (MOP), dealing with ozone layer damage, just ended. This protocol is ratified by all countries in the world and is very successful. Shiming Yang, a university lecturer and member of the Leiden University Global Transformations and Government…