Four different astronomical societies are active in the Old Observatory. We are very proud of the commitment these associations show to organize activities.

In this PhD-thesis several new and existing data science application are described that are particularly focused on applications for tax administrations.

The Heritage and rights of indigenous peoples focuses on the living heritage of indigenous peoples and its safeguarding, connecting the past and the present in local communities.

Changing the world (a little bit)

State fragility and conflict continue to be among the most enduring development challenges of the 21st century. The consequences of fragility and conflict on individuals, States and the international community are profound. At the individual level, an estimated 2 billion people or a quarter of the world's…

Find out how to apply for Law and Society (MSc)  at Leiden University by following our step-by-step guide. 

This dissertation is the first comprehensive description of Makalero, a language spoken by approximately 6,500 speakers in the Iliomar subdistrict, in the south-east of the Republic of East Timor. While previous sources considered it to be a dialect of the larger language Makasae, the present study,…

Source: J Med Chem (2015)

What motivates people to provide help to, or seek help from other groups? And what are the psychological consequences of receiving help from another group?

On the 25th of October, Suze Anja Verkade successfully defended a doctoral thesis. The Leiden University Centre for Linguistics congratulates Suze Anja on this achievement!

What are the arrangements for your pension? What are you entitled to? Until what age do you have to continue working? And can you decide for yourself how your pension contribution is invested?

The land question had a crucial formative influence on Mayo politics in the decades before the First World War and this book shows the part played by many prominent nationalist figures such as Davitt, O’Brien, Dillon and MacBride in shaping the political landscape in Mayo.

Promotor: K. Kuijken, Co-Promotor: H. Hoekstra

This dissertation is concerned with the study of the less than twenty remaining precolonial Mesoamerican codices. By considering these rare and fragile pictographic and hieroglyphic books from the cultural biography perspective, many different aspects of these books can be studied.

Consumer complaints, the war against drugs, family issues, matters of state: Rechtsgeleerdheid (Law) is socially relevant and topical.

Alzheimer's disease (AD) is the most frequent neurodegenerative disorder and the primary cause of dementia. The neuropathological features of AD include the occurrence of senile plaques, neurofibrillary tangles, decreased synaptic density, and loss of neurons. An obstacle in the study and treatment…

OB associations are loose groups of young, massive stars. They constitute the last stage of the massive starformation process, and the context in which new stars are formed.

A management strategy has been developed for field margins to reduce pesticide drift to non-target areas and to promote biodiversity on arable land. To this end, 3 and 6 m wide strips along the edges of winter wheat, sugar beet and potato crops have been left unsprayed with herbicides and insecticides…

Argumentation and rhetorics is the study of how we convince people verbally. In other words, what do people say and how do they say it?

Currently, several successful vaccines are available. However, for pathogens with a highly variable genetic composition, and for which serum IgG antibodies are not a useful correlate of protection, effective vaccines are yet to be developed.

A modern ship design process is subject to a wide variety of constraints such as safety constraints, regulations, and physical constraints.

Learning is easiest out of interest. But interest is often multiple, and expands in various directions. How do you organize education accordingly?

Building a Deep Cross-media Transfer Network to extract visual relations that relieve the problem of insufficient training data for visual tasks.

I have studied the hot, diffuse gas around and between galaxies. Specifically, I have used the EAGLE numerical simulations of galaxy formation to predict the properties of this gas, and I have used those properties to predict specific observables: soft X-ray absorption and emission lines.

The relative simplicity of the bacterial cell, short generation times and well defined and inexpensive culturing conditions have significantly contributed to our understanding of many complex biological systems. Yet the workings of the bacterial genome, seemingly impossibly compressed within a tiny…

Promotor: J. Zaanen

Excavations at Geleen-Janskamerveld 1990/1991

Promotor: Prof.dr. T. Hankemeier, Prof.dr. J.C.T. Eijkel (Twente University)

How can party bans be justified? Which parties were banned in post-war Europe – and why? Do militant democracy instruments work? Is an international militant democracy concept in the making?

On 22 June, Najib Amin defended the thesis 'State-building, lawmaking, and criminal justice in Afghanistan: a case study of the prison system’s legal mandate, and the rehabilitation programmes in Pul-e-charkhi prison'. The doctoral research was supervised by Jan Michiel Otto and Pauline Schuyt.

Promotores: Prof.dr. A.G.G.M. Tielens & Prof.dr. L. Kaper (UvA)

Some species of proteins which can form liquid-like condensates, also exhibit growth into fibers (or fibrils). One particularly interesting set of such proteins are those that are associated with neurodegeneration in which the fiber growth may be related to the pathological fibrils observed in disea…

Promotor: J.W.M. Frenken

Promotor: Prof.dr. T. Hankemeier, Co-promotor: Dr. Theo Reijmers

In some condensed matter systems, such as the surface of a 3D topological insulator, the electrons are effectively massless and we must necessarily use the massless Dirac equation to describe them.

Promotor: C. W. J. Beenakker, Yu. V. Nazarov, Co-promotor: J. Tworzydlo

Gibbs measures, as used in Statistical Mechanics, have a definition that is remarkably similar to the definition ofg-measures, used in dynamical systems.

Andrew Littlejohn published the article 'Ruins for the future: Critical allegory and disaster governance in post-tsunami Japan' in American Ethnologist about the ruins left by Japan's 2011 tsunami.

The aim of the research presented in this thesis was to develop new methods forchallenging systems in liquid-state NMR using paramagnetic effects generated by thetwo-armed probe CLaNP-5.

On the 10th of November, Martin Kroon successfully defended a doctoral thesis. The Leiden University Centre for Linguistics congratulates Martin on this achievement!

The Divide & Quantum (D&Q) project offers various solutions to harness the power of quantum computers in the near term, proposing entire pipelines, from theoretical research, via implementation to real-world case studies in a number of disciplines, to science communication with the broader society.…

Promotor: Prof.dr. R. Verpoorte, , Co-Promotor: Young Hae Choi

Promotores: Prof.dr. J. Aarts, Prof.dr. J.M. van Ruitenbeek

Low-carbon (LE) technologies have a significant potential to reduce the total carbon emissions in China.

Many galaxy clusters exhibit bright diffuse radio emission that traces the underlying structure of the intracluster medium (ICM).

Understanding the formation and evolution of planetary systems is one of the most fundamental challenges in astronomy. To directly image and study young exoplanets and the circumstellar disks they form from, dedicated high-contrast imaging instruments are built.

Currently, Navigation Lab Leiden works on three main themes: navigation ability, spatial abilities, novel techniques in neuropsychology.

Are you mad about board games? Then we’ve got good news for you: we’ve developed our very own University game, HORA EST! It’s a fun way to learn more about the University. Get your family and friends together for an evening of fun and games!