It's one of the big cosmology debates: the universe is expanding, but how fast exactly? Two available measurements yield different results. Leiden physicist David Harvey adapted an independent third measurement method, using the light warping properties of galaxies predicted by Einstein. He published…

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.

This monograph focuses on clustering of objects in high-dimensional data, given the restriction that the objects do not cluster on all the attributes, not even on a single subset of attributes, but often on different subsets of attributes in the data.

The Cyber Security Governance research group contributes significantly to the educational programmes at Leiden University. By integrating cutting-edge research into the classroom, we ensure that students engage with the latest developments in the field of cyber security, governance, and ethics.

The Leiden Institute of Chemistry (LIC) is the basis for research and collaborations of the Leiden chemistry groups. Chemistry is the central science enabling a healthy future in a sustainable society. Chemistry researchers at Leiden University take a fundamental approach in finding tailored solutions…

The project aims to develop an escape room-style game to teach students cyber crisis management and prepare them for real-world cybersecurity challenges

Protein–protein complexes are formed via transient states called encounter complexes that greatly influence the formation of the stereospecific complex.

Promotor: Prof.dr. G.R. de Snoo

Proceedings of the XVII UISPP World Congress (1–7 September, Burgos, Spain). Volume 7/Sessions A4b and A12

The transition period in which men become fathers might provide an important window of opportunity for parenting interventions that may produce long-term positive effects on paternal care and, consequently, child development. Existing prenatal programs traditionally focus on maternal and infant health…

Promotor: Huub J.M. de Groot, Co-promotor: Francesco Buda

The overarching goal of this thesis is to set the foundations, but also make the first essential steps towards establishing a comprehensive, mesoscopic, hydrodynamic theory of epithelial tissues. The stage is set by an exhaustive study of topological defects in passive p-atic liquid crystals, singularities…

In the search for sustainable energy solutions, the idea of artificial photosynthesis has been proposed as an approach with which to use water and sunlight to produce hydrogen.

A novel mathematical model describes spatial-temporal drug distribution within one or more brain units, which are cubic representations of a piece of brain tissue with brain capillaries at the edges.

Promotor: W.Th.F. den Hollander Co-Promotor: F.M. Spieksma

Promotor: Prof.dr. B.R. Katzy, Co-promotor: R. Ortt

Quantum Delta NL, a research programme in which Leiden University participates, has been awarded 615 million euros from the National Growth Fund to help develop the Netherlands into a top player in quantum technology.

This thesis describes the development and validation of new high-contrast imaging techniques, with the ultimate goal of enabling the next generation of instruments for ELT-class telescopes to directly image Earth-like extra-solar planets orbiting around nearby stars.

We are interested in understanding the mechanics of soft materials, of which biological materials are prominent examples.

In this thesis,

Promotor: Prof.dr. G.J. Kroes

Which traits and/or trade-offs determine benefits of being deciduous or evergreen?

The aim of this thesis is to expedite and ensure the systematic accuracy of clearance scaling from adults to paediatric patients, with a special focus on drugs undergoing hepatic metabolism.

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

The outermost layer of the skin, the stratum corneum (SC), is responsible for the skin barrier function, protecting the body from pathogens, chemicals and other unwanted substances from the external environment. The SC lipid matrix provides the only continuous pathway through the SC and is considered…

Parkinson's disease is the second most common neurodegenerative disease in the world. One of its symptoms is the loss of dopaminergic neurons in the substantia nigra pars compacta.

Key publications of the Barz Lab

Simulating human language understanding on the computer is a great challenge. A way to approach it is to represent natural language meanings in logic, and to use logical provers to determine what does and does not follow from a text. What logic is best to use and how natural language meanings are best…

Over the last three decades, the discovery of exoplanets has revealed the boundless variety of worlds beyond our own Solar System⁠. Majority of planetary systems contain short-period planets that are larger than Earth but smaller than Neptune⁠.

A century ago, it was unclear whether the stars in the sky were clustered in groups, or widely spread in the universe.

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

During the bachelor’s programme Astronomy you will immerse yourself in questions about our universe. Questions such as: ‘what happens in a black hole?’ and ‘what is dark matter?’ In doing so you will learn to apply mathematics and physics to astronomical problems and you will work with computer simulations…

The master's specialisation Bioinformatics at Leiden University focuses on research, development and application of computational tools and approaches for expanding the use of biological, medical, behavioral and health data.

The master's specialisation Astronomy Research at Leiden University students focus on astronomical data analysis using models and large-scale simulation, combining the fields of Astronomy, Physics, Mathematics and Computer Science.

At the LION/Sterrewacht new year’s reception, Scientific Director of Casimir Tjerk Oosterkamp handed out the 2017 Hendrik Casimir Prize to physics students Nashwan Sabti (Leiden) and Nikolas Kavadias (Delft). The Casimir Research School yearly awards the prize to the best MSc students in (Applied) Physics…

To be eligible for Astronomy and Education at Leiden University, you must meet the following admission requirements.

To be eligible for Astronomy at Leiden University, you must meet the following admission requirements.

On Wednesday February 7th, Professor Ed Copeland from the University of Nottingham will give the Colloquium Ehrenfestii.

Development of effective VR training for International Law of Armed Conflict (ILAC)

If we want to build robots and computer systems that are not only smarter but also possess more social skills, we first need to find out more about how humans interpret information. Max van Duijn and Tessa Verhoef conduct research at the intersection of cognitive science and AI.

We review the state-of-the-art in the theory of dissociative chemisorption (DC) of small gas phase molecules on metal surfaces, which is important to modeling heterogeneous catalysis for practical reasons, and for achieving an understanding of the wealth of experimental information that exists for this…

Dive into the heart of archaeological science: explore the flora and fauna of bygone ages, study human bones and teeth, analyse the cultural biographies of material objects, or become an expert in the use of digital data in archaeological research.

The dissociative chemisorption of a molecule on a transition metal surface represents a rate-limiting step in many heterogeneously catalyzed processes, whereby most chemicals are made. In spite of the importance of this reaction, an accurate first principles approach to modeling it does not yet exist.…

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…

This 4-year research project focuses on vernacular and unacknowledged heritages of the highlands of Bhutan. It seeks to make a major contribution to the preservation of these heritages, to create a cultural resource for current and future generations.

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 research programme of the Prehistoric Farming Group (European Prehistory) has several research projects. The largest and longest in terms of continuity is the Maaskant project directed by prof. dr. Harry Fokkens.

The research involves the application and combination of archaeological and archaeometrical methodologies. Petrographic analysis and isotopic provenance studies of raw materials and exotics, and the study of the distribution patterns of these materials are used to gain insight into the exchange of goods…

In this unique master’s programme you will first deepen your knowledge on specific areas of the world and then learn to reflect upon this in a global context.