The last decades it is increasingly recognized that acute as well as chronic postoperative pain is an important problem. Treatment and prevention of postoperative pain is a challenge, especially in special patient populations where there is only limited guidance on how to optimally use opioids.

How German Jews used photographs to document their experiences in the face of National Socialism.

This Festschrift in honour of Cary J. Martin

If an algorithm has to learn to understand language, simply having a lot of data doesn’t help much. Like us, a computer has to learn the language in interaction with others. Tessa Verhoef is fascinated by how this interaction works.

Linde Desmaele explores the role of US theatre nuclear weapons stationed in Europe. Moving beyond the deterrence vs. reassurance debate

Why do sexual violence policies still fail to systematically address men and masculinities, when the need for cultural change among men has been central in public debates since #MeToo?

Without scientific knowledge, we won’t be able to tackle the grand challenges of the 21st century: climate change, energy transition, social inequality and coronavirus, for example. Professor by Special Appointment of the Social Value of Science Laurens Hessels is therefore calling for more transdisciplinary…

There are still things we can learn from the Ancient Greeks. How they managed to make sure that innovations were accepted, for example. A group of classics scholars, led by Leiden, will be carrying out research on this question funded by the largest ever NWO subsidy.

Masterclasses, network meetings and coaching cafés: the Alumni Office was offering a whole range of activities every month for the University’s alumni. Until coronavirus broke out, that is. The Leiden Alumni Webinars mean that alumni can still meet and share their knowledge with interesting speakers.…

Particularly during this time of social distancing and remote learning, it is important to carry on meeting new people – even if you don’t always feel like it after another day staring at your screen, says Wessel van Dam. In his role as assessor at the Honours Academy, Wessel represents the interests…

Leiden University was present for the second time at the second Leiden Pride on Saturday.

If there’s one place at the University where it doesn’t matter where you come from, it’s De Kattekop. This, the University nursery, celebrates its 40th birthday in September. Its history reflects developments at the University. Parents are full of praise for it.

Native women are invisible in Mexican society. This is the conclusion Barbara Ortiz draws in her dissertation. PhD defence on 23 February.

A clear, unambiguous definition of an extraparliamentary cabinet still seems to be missing in the political arena of The Hague. Caroline van der Plas, Farmer–Citizen Movement (BBB) party leader, wants to discuss this issue with the party chairs of the Dutch coalition parties. Wim Voermans, Professor…

The oldest forms of literature and law originate from Mesopotamia (3000 BC until AD 70), as do important discoveries in science and technology. All these developments were recorded in cuneiform texts on clay tablets. There is still a lot to learn from the study of cuneiform texts, says Professor of…

A recent ruling by the Dutch Council of State indicates that asylum seekers may no longer be sent back to Italy. The Council of State increasingly concludes that the countries at Europe's southern and eastern external borders expose migrants to degrading treatment. This in particular is a reason for…

Pieter Omtzigt, a strong contender in the polls for the Dutch general elections with his New Social Contract party (NSC), has said he would prefer to remain in parliament as party leader. He is not saying who the NSC candidate for prime minister might be and will only reveal this after the elections.…

Leiden University's Pre-University College is celebrating its 20th anniversary. The programme introduced hundreds of secondary school pupils to science and the university. We asked those involved how PRE became so popular: ‘The students are the reason it still exists today.’

Hans Slabbekoorn is specialised in animal sounds. On 1 July, he was appointed professor of Acoustic ecology and behaviour. A great honour, according to the new professor. ‘This job never gets boring, whether I am investigating the urban jungle or marine noise.’

An international team of astronomers including Leiden scientists publishes the image of a young star with a surrounding dust disk that is still being fed from its surroundings. The phenomenon around the star SU Aur may explain why so many exoplanets are not neatly aligned with their star. The European…

Lichens enthusiast Sander van Zon was eager to use his knowledge for his internship. He wrote an excellent thesis on lichens’ biodiversity in the city, of which his first scientific publication will appear soon. With it, he is nominated for the Leiden Science Young Talent Award 2022.

Reuse everything and stop producing waste. By 2050, the Netherlands should have a circular economy. However, the new Integral Circular Economy Report by the Netherlands Environmental Assessment Agency (PBL) shows that there is still a long way to go. For the report, the Institute of Environmental Sciences…

Chances that Dutch Prime Minister Mark Rutte will become Secretary General of NATO are becoming increasingly likely now that the US and most western countries have expressed their support. The question now is how to appoint someone to the position of Prime Minister, who to appoint and when the situation…

How do we know what a quantum computer is good for when it hasn't been built yet? That's what PhD candidate Casper Gyurik investigated by combining two terms you often hear: quantum computing and machine learning.

On this page you'll find the recordings of the programme presentations held at the Leiden University Bachelor's Online Open Day of 7 October 2023. Perhaps you joined this event and would like to rewatch the presentations or are curious about ones you didn’t see the first time around. Or you haven't…

Franx

A couple of years ago, theoretical physicist Carlo Beenakker tracked down the Majorana particles and inspired Leo Kouwenhoven from TU Delft to try to create them in a superconducting nano-structure. He succeeded in doing so in 2012, and the news made headlines around the world. But a lot of work still…

Decarbonizing the building stock is critical for realizing the climate-neutral target for the Netherlands.

The urban graveyard presents several studies in which the results of older archaeological and osteoarchaeological research are compared to more recent excavation data from several Dutch, Belgian and Danish cities and towns.

The Oral History project, as part of the Tell Balata Archaeological Park project, published an arabic-english booklet of local stories about the site of Tell Balata. An archaeological site near Nablus (West Bank).

Cathodic corrosion for producing nanoparticles was (re)discovered when trying to control the electrochemical etching of a scanning tunneling microscopy (STM) tip.

Known technical issues that still need a definitive solution.

The central question is whether the current regime of international humanitarian law governing the conduct of hostilities in armed conflict is still adequate to deal with modern conflict scenarios, or whether it needs revision or amendment.

What does it mean to eat healthily and responsibly? This question is gaining a new urgency now that in many countries undernourishment is being overtaken by diseases of affluence, such as obesity, and we are also becoming more aware of the environmental impact of our eating habits. It’s time to take…

In educational settings such as museums, universities and schools, white, male, able-bodied and rational subjects still dominate. Although there has been a lot of theoretical work on processes of in- and exclusion through racialization, sexualization, and disabilization, we still know very little about…

From the Big Bang to superconductivity. Many ground-breaking discoveries have been made in Leiden University’s long history.

Does democracy still work? How does political representation function in times of fragmentation, populism and polarization? You will study the challenges that established and new democracies face.

Promotores: J. Jonkers, K.E. de Visser

The effects of anthropogenic noise on interactions between predators and their prey are still little understood.

Morphometric and morphological differences have been used extensively in the past to study domestication of the wolf and the origin of dogs. Certainly before genetic testing was performed, these methods were the only means to diverge both groups. But still now, when aDNA cannot be extracted, morphometry…

Promotores: F.H. van Lunteren, F.P. Israel

Acidobacteria is a widely distributed phylum but their functional roles in ecosystem processes are still largely elusive.

On this section of the website you can find more information about the Old Observatory and the current astronomy research institute.

Missed the registration deadline of 15 May and still want to start in September 2025? If you have a free admissable Dutch bachelor, you can still sign-up for our master's programme via Studielink until August!

Are you thinking about studying Biology? Learn more and watch the videos.

Are you thinking about studying Statistics and Data Science? Learn more and watch the introduction video.