A large diversity of exoplanetary systems has been found, but it is still unclear what drives this diversity.

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

What is the origin of solar systems?

An international team led by Leiden astronomers has discovered why the two stars of binary star DI Herculis rotate so strangely around one another, which once even proved problematic for Einstein's theory of relativity. Their findings were published in Nature.

Promotores: S.F. Portegies Zwart, E. M. Rossi

Binary systems, consists of five electronic compositions, in each of which Richard Barrett worked with a specially made recording from an improvising instrumentalist to produce a new kind of compositional collaboration: Daryl Buckley (electric lap steel guitar), Ivana Grahovac (cello), Lori Freedman…

Promotor: Prof.dr. V. Icke, Co-Promotor: T.I. Madura

Promotores: K.J. Batenburg, B. Koren

Investigating neurobiological endophenotypes of Social Anxiety Disorder

Promotores: R. Tijdeman, K.J. Batenburg

For centuries astronomers studied the Universe by collecting light. Nowadays, we are living in times of great technological advancements, which allow us to explore our Universe in a new way - though gravitational wave radiation.

Tonal bilinguals of two closely related Chinese dialects are amazing people. They handle two tonal systems in their mind; their two vocabularies are from closely related dialects, and they write translation equivalents with common Chinese characters. Their unique language situation makes their mind…

PhD Defence

In this thesis, we present new laboratory data of interstellar dust analogues.

On 1 December 2020, Bernadette Muscat defended her thesis 'Insolvency Close-out Netting: A comparative study of English, French and US laws in a global perspective'. The doctoral research was supervised by Prof. M. Haentjens and Prof. B. Wessels.

In this article for Studies in Conflict & Terrorism, the authors analyse the evolution and interplay of national policies and international diplomacy on cyber terrorism within and across the UNSC’s permanent five members and the UN process on cyber norms (GGE and OEWG).

What workflow of non-destructive techniques provides accurate, valuable data to improve our understanding of Caribbean archaeological landscapes? How were Amerindian settlements configured?

We celebrate Leids Ontzet, the Relief of Leiden, on Monday 3 October. This means that all University buildings in Leiden will be closed. The University buildings on Campus The Hague will be open, but there will be no classes.

Dust particles in space form the basis for new stars and planets. But what do these particles consist of and how do they behave? Sascha Zeegers studied this. PhD defence 1 November.

Please note that if you haven’t done so already and wish to make use of the Early Bird Registration for the conference, that it closes on 1 March.

What did the pub culture in Leiden look like in the nineteenth century? Where do specific signs in sign language originate from? How did scholars collaborate in research projects before the era of digital communication?

The high velocity tail of the total velocity distribution of stars provides essential insight into fundamental properties of the Galaxy.

On Wednesday 3 October we will celebrate the Relief of Leiden, so all Leiden University premises will be closed that day. The University premises at our campus in The Hague will remain open (with the exception of Anna van Buerenplein/Leiden University College).

On Tuesday 3 October we will celebrate the Relief of Leiden, so all Leiden University premises will be closed that day. The University premises at our campus in The Hague will remain open (with the exception of Anna van Buerenplein/Leiden University College).

ICEHL is a conference on all aspects and subjects relating to English Historical Linguistics. Having started in Durham, in 1979, its twenty-first edition will be held at Leiden University Centre for Linguistics 8-12 June, 2020.

What is the relationship between probability experiments and cryptographic applications?

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

We analyse the link between media consumption and the attitudes toward people living with HIV/AIDS in Chile. We used data from a sample of 1000 people, obtained in the 2011 wave of the World Values Survey (WVS). We use a logistic binary regression model by maximum likelihood. Our results suggest that…

From 25 December till 3 January, all University buildings will be closed. The University Library and a number of faculty libraries will have limited opening hours.

PhD Defence

PhD Defence

The Old Observatory houses four historical telescopes. On this page you can learn more about them.

The LLM Advanced International Civil and Commercial Law programme (ICCL) got off to a successful start last year. As a result of the academic bonds forged between staff and students Ilya Kokorin (ICCL student 2014-15) and Jeroen van der Weide (ICCL lecturer) took part in a competition for best comparative…

The objective of this project is the development of a new psychometric model, called the Generalized Squared Distance Logistic Model (GSDLM). This model is an evolution of older psychometric approaches (such as PARELLA, GHCM, and GGUM) and the Gaussian Ordination Models (GOMs) used in environmental…

Promotor: S.J. Edixhoven, Co-promotor: K.J. Batenburg

Does the δ-machine have higher accuracy than the other feature-based classifiers in some conditions?

How does the cluster bootstrap procedure in combination with various types of linear models perform in the analysis of longitudinal data, compared to other methods.

This book aims to understand cultural transitions and negotiations between art and politics from 1989 to 2020 through analysis of a series of Cuban novels.

Our call for workshop proposals was met enthousiastically by various people, and we are happy to announce that the following four workshops were unanimously selected by the organising committee.

We are happy to announce that the Call for Papers for ICEHL-21 is now out.

Due to holidays the Academic Language Centre is closed from 23 December until 2 January.

The KNMI has issued a code red weather warning because of slippery conditions. This applies from 03.00 on Monday 15 February. All university buildings, both in Leiden and The Hague, will therefore remain closed until at least 12.00. Update: the buildings will reopen after 12.00.

The second call-for-papers has now closed and those who have submitted an abstract will hear whether their papers have been accepted or rejected by the end of November. The organizing team is keeping an eye on all developments regarding the Coronavirus and will decide in December whether ICEHL-21 will…

On 18th to 20th May Aalborg University hosted the MIDA Closing Conference (Migration and Inclusion in the Labour Market) in Copenhagen. The conference focused on the changes, challenged and advantages of cross-border labour mobility within the EU.

Close contact between women and dogs in prehistoric times Women and dogs were in close contact in the neolithic age of hunters-fishers-gatherers. This has been suggested by Leiden osteoarchaeologist Dr Andrea Waters-Rist and fellow researchers who have studied a tiny biological fossil. The fossil was…

It is a holy grail among behavioural scientists: can you predict how close a group will become? An international research team from Leiden, Oxford and Helsinki has investigated the development of friendships within the Leiden student association Augustinus and obtained some remarkable results.

On 26 and 27 September 2016, the Faculty of Archaeology of Leiden University hosted the closing symposium of the HERA-CARIB project “Caribbean Connections: Cultural encounters in a New World setting”.

Promotor: Prof.dr. F. den Hollander

Business Process Model and Notation (BPMN) has become the standard for business processes diagrams.