In this thesis, we use low-frequency and high-frequency radio observations to address the following questions regarding quasars: is the radio loud/quiet quasar dichotomy real?

The project seeks to come to an understanding of the archaeology of the desert and the ways in which its inhabitants engaged with their constraint, marginal environments through time. It compares and interprets site distribution and community organisation over a long time scale and across several different…

The work presented in this thesis is based on ALMA surveys of protoplanetary disks in three star-forming regions: Lupus, OMC-2, and NGC 2024.

This dissertation addresses the position of artistic research within academia.

The formation of stars and planets happens over multiple scales, which can interact. In particular, planet formation happens in the dense, complex environment of star forming regions.

Promotor: Prof. dr. A.G.G.M. Tielens

This new handbook by Frits Naerebout and Henk Singor places the history of the Greeks and Romans within the larger context of the contemporary Eurasian world.

The updated E-Primer expands its proven combination of simple explanations, interesting tutorials and fun exercises, and makes even the novice student quickly confident to create their dream experiment​​​​​​ in E-Prime 3. E-Prime is the leading software suite by Psychology Software Tools for designing…

PhD defence

We cover the entire spectrum from target identification to the evaluation of the efficacy and safety of novel medicines in clinical practice.

On 26 October, Hetty ten Oever defended the thesis 'Healthcare Purchase Agreement: The legal relationship between the health insurer and the care provider from a contract law perspective. The doctoral research was supervised by Henk Snijders and Iris Houben

The earth has more than 7 billion inhabitants, all of whom leave behind traces of pollution. However, not all forms of pollution have the same harmful effect. Leiden scientists help determine where we should put our priorities.

Simulations of galaxies help researchers understand astronomical observations better. The EAGLE simulation, a large project in which Leiden astronomers play a leading role, shows the evolution of the Universe, from just after the Big Bang to the present day.

This thesis presents pioneering work on the panchromatic emission of some of the most luminous galaxies in the early Universe: star forming galaxies and active galactic nuclei.

The project examines the political conflict in the Red River Valley of Louisiana between the majority-black Republican Party and the overwhelmingly white Democratic Party by studying the composition and actions of each party.

Promotor: Prof.dr. K.H. Kuijken, Co-Promotor: Dr. H.Hoekstra

Stellar feedback is a crucial ingredient in the evolution of galaxies.

Through the clever use of two types of telescopes, a team of researchers has produced stunning images of clusters of galaxies. This not only produces beautiful images, but also provides more information about the enormous amounts of energy released around supermassive black holes in clusters. The astronomers,…

The first photo of a black hole and measuring anxiety in the brain... From 13 until 22 May we're serving a free slice of science with your pizza.

Lecture, Oort lecture

This project applies a social-historical approach to examine and contrast various groups of African-American slave refugees who sought freedom within North America between 1800 and 1860. It innovatively distinguishes between different “spaces of freedom” for runaway slaves, namely sites of formal, semi-formal,…

Truth is stranger than fiction. In 1997 Juan Maldaceña discovered a remarkable dictionary that translates equation for equation the physics of black holes in string theory into the more conventional physics of quantum mechanics of interacting particles. The remarkable possibility exists that…

Piercing through the skull with an ice pick, administering electric shocks without an anaesthetic, or applying leeches to the uterus: these may seem like medieval methods of torture, but they are in fact therapies used in medicine. Willem van der Does writes about all of them in his new book. ‘Physicians…

In the South African context, certain iconic images have been a dominant source for public understandings of historical events. The emphasis given these images tends to overshadow the historical value of other more personal photographic sources – like studio or amateur photography. This project looks…

Rossi

Macrophages and atherosclerotic lesions The infiltration of monocytes in the arterial wall, their differentiation to macrophages, and the subsequent accumulation of cholesterol in these macrophages initiate the process of atherosclerosis. We study the importance of specific genes in macrophages for…

Dark matter is one of the biggest mysteries of the Universe. Its properties cannot be explained with the known laws of physics and elementary particles.

This thesis investigates how galaxies form and what diversifies the evolutionary histories of galaxies.

So far it has been impossible to compare large sets of syntactic constructions in large sets of languages systematically and automatically. The online availability of parallel text corpora and software tools to align, enrich, search and analyse them has the potential to make automatic massive systematic…

A high performance computer or supercomputer owes its massive processing capacity to the fact that it chops a single overarching task into a whole series of smaller tasks. It simultaneously tackles each of those smaller problems.

They hurtle along at over a thousand kilometres per second: the fastest stars in the Milky Way. PhD candidate Fraser Evans conducted research into these elusive hypervelocity stars and discovered that they have a lot to teach us, about black holes and supernovae, for example.

PhD defence

The Cide Archaeological Project: Surveying the Turkish Western Black Sea Region

When a star gets too close to a supermassive black hole, it is torn apart by strong tidal forces in a tidal disruption event (TDE).

In Quantum mechanics, particles can be in multiple positions simultaneously. Yet, when a measurement is made, the particle is found only in one place. Technology has come to a point where we may design experiments that will tell us how.

The main interest of this project concerns learners’ perceived learning outcomes in massive open online courses and the factors related to their perceived learning outcomes.

PhD defence

Existing work in probabilistic language modeling can be mostly divided into two categories:

an integrated, secure, permanent, on-demand service-driven, privacy-compliant and sustainable e-infrastructure for the processing, analysis and information-mining of the massive amount of medical molecular phenotyping and genotyping data that will be generated by metabolomics applications now entering…

Henk Versnel's work on ancient religion has been seminal. For his 80th birthday, a group of scholars assembled to celebrate and analyze his oeuvre.

As one of the most influential ideas in modern European history, democracy has fundamentally reshaped not only the landscape of governance, but also social and political thought throughout the world.

One of the current research projects funded by the profile area Political Legitimacy is

From the 1920s on, popular music in Southeast Asia was a mass-audience phenomenon that drew new connections between indigenous musical styles and contemporary genres from elsewhere to create new, hybrid forms. This book presents a cultural history of modern Southeast Asia from the vantage point of popular…

Smart algorithms and powerful processors are just as essential for astronomy as big telescopes. Astronomers at Leiden University therefore constantly operate at the interface between astronomy and data science.

The origin and evolution of galaxies are closely linked to many different physical phenomena.

This is an Erasmus+ International Credit Mobility project of Leiden University’s Faculty of Humanities with Anton de Kom University in Suriname.

This dissertation is a study of archaeological remains left behind by nomadic communities in the Black Desert, situated in the northeast of modern Jordan.