Mycorrhizas are symbiotic associations between soil fungi and most plant species.

This work is dedicated to interpreting in cohomological terms the special values of zeta functions of arithmetic schemes.

Promotores: Prof.dr. C.A.J. Knibbe, Prof.dr. M. Danhof, Prof.dr. K. Allegaert (Leuven)

Polls conducted by I&O research point to a political landslide. What's in store for the Netherlands? The polls show that the new party of MP Pieter Omtzigt is well-positioned for the upcoming election, with an expected 31 seats, but only 3 for the Christian Democratic Alliance (CDA) party. It is obvious…

The origin and evolution of galaxies are closely tied to the cyclic feedback processes between stars and the interstellar medium (ISM).

The aim of the project is to unravel the genetic and contact relations between the indigenous languages of Mesoamerica (Mexico and western Central America) and the Middle Andes region (Ecuador, Peru, Bolivia), as part of a larger endeavor to understand the historical process of the peopling of the Americas…

In this dissertation, matching, entropy, holes and expansions come together. The first chapter is an introduction to ergodic theory and dynamical systems.

Voters sent a clear signal in the recent Dutch provincial council elections with the 'monster' victory for the Farmer-Citizen Movement (BoerBurgerBeweging, BBB). This sign of ‘social resistance’ has consequences for the policy on nitrogen emissions, according to Geerten Boogaard, Professor of Local…

Ancient historians have long been aware that patterns of coin circulation can shed light on levels of economic integration in the Roman Empire. More than forty years ago, Hopkins argued that large amounts of tax money were spent in the frontier provinces and that the non-military provinces recouped…

A comprehensive analysis of the state of play, the design of monitoring mechanisms, and creation of a toolbox of support measures.

Prof.dr. P. Stevenhagen, Prof.dr. K. Belabas (Universite Bordeaux I)

The Leiden Science Young Talent Award is awarded yearly to a student who completed their bachelor’s degree with an excellent thesis.

How did early modern people find out about new knowledge? And did that make them more willing to accept innovation? In the coming years, we will study how and to what effect, new knowledge anchored among the wider public in the early modern Low Countries.

On the 23rd of June Arianna Sacco successfully defended a doctoral thesis and graduated.

Heart failure is a major health care problem with high mortality.

This PhD project investigates how Russian state-aligned media frame the war in Ukraine for international audiences and how these frames travel across borders, being adopted, adapted, or challenged by foreign media and political actors.

Food security is challenged by a growing global population and by climate change. Drought and soil salinity are considered the most important ones that inhibit crop yield and distribution. Worryingly, climate change is predicted to increase not only their frequency and severity, but also their co-occurrence,…

The thesis mainly contributes to the characterization of Majorana fermions as they appear in the Condensed Matter context.

In this thesis we use Josephson and noise scanning tunneling microscopy for the study of conventional, unconventional (iron-based) and disordered superconductors. On the one hand, Josephson scanning tunneling microscopy allows us to directly visualize the superfluid density with high spatial resolut…

Promotores: Prof.dr. F.P. Israel, Prof.dr. P.P. van der Werf

Based on the results of a language-switching experiment, PhD candidate Fatemeh (Simeen) Tabassi Mofrad MA and Professor Niels Schiller have discovered that the traditional categorisation of brain areas is not sufficient. They published their research findings in the scientific journal NeuroImage.

A portrait can inspire, intimidate or reassure the viewer. Leiden University has many portraits of professors and students, from the foundation of the University to the present day. What purpose do these portraits serve? The 'Facing Inspiration' exhibition in the Oude UB is about this question.

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.…

Dementia is a progressive disease, diagnosed at a relatively late stage when intervention may not be effective. Aim of the research is to study scans of brain networks to help discover the early network changes related to dementia. Early diagnosis may benefit effectiveness of future treatment.

NeuroSoC concentrates on multiprocessor systems on chip with in-memory neural processing units.

Erik Bähre has been elected to the board of the Society of Economic Anthropology of the American Anthropology Association. On top of this he has joined the scientific advisory board of the NIAS-Lorentz Program.

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

The effectiveness of the skin barrier underlies the outer layer of the skin: the stratum corneum (SC). However, in several skin diseases this barrier is impaired. In two inflammatory skin diseases, atopic eczema and Netherton syndrome, an increased level of monounsaturated fatty acids (MUFAs) has been…

In the era of big data, extracting insights from complex datasets is a key challenge. This thesis demonstrates the superiority of graph-based methods over traditional clustering (e.g., k-means, DBSCAN) and outlier detection for analyzing high-dimensional and noisy data.

Methods for accurately computing the interaction of molecules with metal surfaces are critical to understanding and thereby improving heterogeneous catalysis.

Promotor: H.J.A. Röttgering, Co-promotor: G.K. Miley

In this dissertation, we work towards an experiment in which we aim to bring a micrometer sized magnet at the tip of a soft cantilever into a superposition.

This thesis provides explicit expressions for the density functions of absolutely continuous invariant measures for general families of interval maps, that include random maps and infinite measure transformations, not necessarily number systems.

The dissociative chemisorption of methane on metal surfaces is of fundamental and practical interest, being a rate-limiting step in the steam reforming process. The reaction is best modeled with quantum dynamics calculations, but these are currently not guaranteed to produce accurate results because…

Forming at the nodes of the Cosmic Web and growing hierarchically via mass accretion, galaxy clusters are the largest virialized halos in our universe, composed of dark matter (DM; ≥85%), ionized hot plasma in the intracluster medium (ICM; ≥10-15%), and galaxies (≥1-5%).

Climate change is a challenge for both current and future generations. New biological resources have to be developed in order to meet the demand for energy as well as the demand for food.

Source: Journal of Investigative Dermatology, Volume 135, pp. S59-S59 (2015)

I will give a general introduction to the field of molecular electronics, its history, methods and challenges. I will also introduce the subject of my investigation and provide a brief outlook to the remainder of our thesis.

LUCIS funded several research programmes to boost interfaculty and interdisciplinary cooperation and to widen the involvement of LUCIS members.

This book explores the production and use of medieval manuscripts that contain classical Latin texts. Six experts in the field address a range of topics related to these manuscripts, including how classical texts were disseminated throughout medieval society, how readers used and interacted with specific…

Book by Dr. Mariana Françozo resulting from her research into the collection of count Johan Maurits of Nassau-Siegen, governor of the Dutch colony in Northeastern Brazil between 1637 and 1644.

More European countries are introducing border controls, clashing with the ideal of free movement within Europe. Daniel Schade, Assistant Professor of EU Studies at Leiden University, analyses this development in The Washington Post.

This long term project in Jordan is at the basis of many specialists’ studies and has several off-shoot projects. The project, with its many approaches, is also a framework for much teaching in Levantine Archaeology at Leiden University, especially concerning fieldwork methods, artefact studies, research…