Learning from small data sets in machine learning is a crucial challenge, especially when dealing with data imbalances and anomaly detection. This thesis delves into the challenges and methodologies of learning from small datasets in machine learning, with a particular focus on addressing data imbalances…

Osteoarchaeologists help forensic scientists solve crimes. They also study bone material from the Second World War in order to identify victims.

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

How can we find novel natural products from Actinomycetes that act as growth modulators on mammalian cells? Can we harvest and develop the potential of these novel compounds for industrial and medical biotechnology?

Leiden archaeologists investigate how people in the past impacted their environment. Together with scientists, environmental scientists, and humanities experts, they use this information to draw conclusions about the present – and show what we can learn from it for the future.

Archaic and Classical architectural terracottas constituted an integral part of the architecture of monumental buildings at Akragas. These objects therefore provide unique insights into the built environment of sanctuaries at this important Greek colony in Sicily. This research's multi-disciplinary…

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…

Like any language, the natural sign languages of deaf communities differ from each other in their grammars and lexicons. A growing number of studies indicates that sign languages make use of the gestures of hearing speakers to build linguistic structure. This implies that variation and similarities…

Are you a British citizen currently studying at Leiden University? Find out about the effects of Brexit such as the transition period, residence permits, tuition fees and more.

Coming to and living in The Netherlands after Brexit.

Like any language, the natural sign languages (henceforth: SLs) of deaf communities differ from each other in their grammars and lexicons. A growing number of studies indicates that SLs make use of the gestures of hearing speakers to build linguistic structure. This implies that variation and similarities…

The Leiden Institute of Advanced Computer Science (LIACS) aims on doing applied research with partners. You can be involved in our research, and in the knowledge transfer of our research results.

Social science research helps us understand human behaviour and social structures. These are determined by various factors, which makes the research complex and increases the likelihood of drawing the wrong conclusions. The choice of research method and analysis is therefore extremely important. It…

On the 17th of January, Sarah Von Grebmer Zu Wolfsthurn successfully defended a doctoral thesis. The Leiden University Centre for Linguistics congratulates Sarah on this achievement!

Promotor: M. de Jong, Co-Promotor: Samtleben

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Biological cells, the basic building blocks of all life forms, are surrounded by a lipid membrane. More than half of the membrane is occupied by membrane proteins, which can regulate the cell functionality through specific arrangements.

What are 'defects' and mechanical properties of mosaics of different shapes of tiles?

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.

Galaxies form and live inside dark matter haloes. As a consequence, they are exposed to the tidal fields generated by the surrounding matter distribution: this imprints a preferential direction to the galaxy shapes, which leads to a coherent alignment on physically close galaxies, called intrinsic a…

Materials balances have been used in the recent past for the analysis of substance oriented environmental problems and the formulation of measures for environmental policy. In this study an integrated tool, based on the materials balance principle, has been developed for the analysis of both environmental…

Patients share valuable advice and experiences with their peers in online patient discussion groups.

Organized by the Grotius Centre for International Legal Studies, this programme enables students and professionals from all over the world to engage in discussions on the prospects and challenges of international criminal justice. The announcement for the next edition is scheduled to take place…

New Approaches to the Study of Textual Material from the Early Pharaonic to the Late Antique Period

A Functional Analysis of Pre-Columbian Shell and Stone Artefacts from Anse à la Gourde and Morel, Guadeloupe, FWI

One of the current research projects funded by the profile area Political Legitimacy is the research group From Disorder to Order: Conflict and the Resources of Legitimacy.

Muslim scholars work in a long and rich tradition of knowledge-production in their own culture.

Promotor: J.N. Kok, Co-Promotor: A.J. Knobbe

The second and final report on the Netherlands‘ crime-terror nexus has analysed all fourteen profiles of individuals arrested in 2015 for offences of terrorism.

The Mycenaean civilization of ancient Greek times offers enormous potential for useful information: from innovative construction methods to ways of handling crisis situations as a society. Archaeologist Ann Brysbaert and her team analyse Mycenaean construction processes in the ERC Consolidator project…

Leiden University archaeologists are reconstructing houses from the Stone Age, using only resources available during that period. This method offers surprising insights into the ingenuity of our distant ancestors, and challenges existing archaeological views.

Brain development in children with an extra X chromosome as compared to children with autism: evidence from MRI

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).

Plants could be regarded as small chemical factories, which produce chemical substances via photosynthesis. If we can imitate photosynthesis in an artificial system, we can make clean fuels and materials out of sunlight and CO2. Huub de Groot is very close to designing a system of this kind.

This summer school is for graduate (MA and PhD) students and researchers who have an interest in handwritten materials, editing, and the tradition of editing in the Muslim world. It offers theoretical lectures as well as hands-on practice with samples from the world-famous collections of the Leiden…

An Ancient Egyptian System of Workmen’s Identity Marks

The intracluster medium (ICM) is a hot, tenuous and X-ray emitting gas that pervades galaxy clusters.

On Wednesday 25 January 2017 Esmeralda Vergeer will defend her doctoral thesis Regeldruk vanuit een ander perspectief (Regulatory burden from a different perspective). The supervisor of the research is Professor W.J.M. Voermans.

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This thesis discusses the development in Proto–Indo–European, Latin and Romance of a word–formation pattern which the most adequate terminology in use dubs ‘verbal government compounds with a governing first member’; I use the shorthand ‘pickpocket compounds’.

The debate in Europe about digital sovereignty, technological sovereignty, data sovereignty and strategic autonomy has been building over recent years at both the EU level and the level of individual Member States. The different concepts – and their diverse interpretations – cover the sovereignty concerns…

An integrated approach to ceramic standardization and change in Archaic Satricum (6th–4th century BC)

Are you currently enrolled in an applied sciences programme and are you considering a university master? At Leiden University you are more than welcome. A master at University will provide more depth in knowledge and you are able to specialise in a great number of areas of expertise. With the right…

Every month a member of the Institute for History tells about a book that inspired him or her. Afterwards, the pen is passed on to another colleague. This month dr. Meike de Goede tells about the book 'Between Tides' by Valentin Mudimbe. The novel, little known beyond the circles of Africanists and…

A Study of Middle Palaeolithic Riverside Settlements at Maastricht-Belvédère (The Netherlands).

How can child participation be defined, what is the importance of child participation and how can it be promoted?

PhD defence

Through extensive archaeological and documentary research, this study aims to provide a detailed analysis of the maritime cultural landscape of St. Eustatius over the past four centuries. It focuses on bridging the gap between the marine and terrestrial worlds and demonstrates that in order to truly…

Development of Natural Resource for New Medicines