This paper addresses the gap that explores how agencies might allocate their personnel so as to maximise performance with the personnel they have.

Sepsis is a life-threatening condition caused by a dysregulated host response to infection, it is associated with significant morbidity, mortality, and with a high financial burden on global healthcare systems. Bacterial infections are the primary cause of sepsis, but the growing prevalence of antimicrobial…

The aim of the RAISE study is to investigate how resilient people respond to stress. Specifically, we will study how key biological systems (HPA-axis, immune system) interact with the brain and social environment in order to facilitate resilient functioning after childhood adversities.

On 19 May 2020, Xuechan Ma defended her thesis 'Moving towards Coexistence and Cooperation: The Spratly Islands and International Law'. The doctoral research was supervised by Prof. N.J. Schrijver.

Plants and their pollinators form complex interaction networks. Within these networks, species differ widely in the number of species they interact with.

Stars and planets form within cold, dense clouds of gas and dust drifting through interstellar space. Although dust makes up only a small fraction of this material, it plays a key role in shaping the chemical evolution of these environments.

On the occasion of the 80th anniversary of the magna carta of civil aviation, the Convention on International Civil Aviation (Chicago Convention 1944), Professor Steven Truxal has written a leading piece for the European Civil Aviation Conference: The Chicago system: a steadfast legal blueprint for…

We developed the bitterling as a unique, well-studied model organism in the area of the evolutionary ecology of brood parasitism. The bitterling-mussel relationship, interspecific mussel host preference, and mussel gill structure are studied in detail, to help understand the developmental adaptation…

On 21 September 2022 H. Hu successfully defended a doctoral thesis and graduated.

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…

Almost all languages of Europe and of a large part of western Asia belong to a single language family, which is called Indo-European, and which includes modern languages like English, Dutch, Russian, Farsi, but also ancient ones like Ancient Greek, Latin, Hittite and Sanskrit.

In recent years, the question why citizens (do not) support democratic innovations has attracted increasing academic attention. In this research note, Van Der Does & Kantorowicz for the first time empirically verify what drives citizens’ instrumental considerations in their evaluation of a DI.

The master’s specialisation Evolutionary Biology at Leiden University investigates biology at all levels. The specialisation includes genomics, functional developmental genetics, paleobiology, behavioral biology and evolutionary ecology.

On Friday 7 March 2025 Adam Knight successfully defended a doctoral thesis and graduated.

Inflammatory skin diseases such as psoriasis and atopic dermatitis can severely impact both the physical and social aspect of a patient’s life. Aberrant inflammatory responses are thought to be a major causative factor in these disorders, but an abundance of different factors contribute to the development…

The aim of this research is to define the relationship between sources of articulation for different kinds of instrument in the period between the beginning of XVI century (first extant indications) and the end of XVIII century.

Thirty years ago, mutations in the BRCA1 gene were first linked to hereditary breast and ovarian cancer, establishing a genetic basis for cancer development.

The recent terrorist attacks in Europe are presumably not just acts committed by individuals, but acts facilitated by larger jihadist networks. But how do such networks operate? Understanding their modus operandi can be useful knowledge to counter terrorist threats.

Atherosclerosis is a chronic inflammatory disease affecting millions of people world-wide.

The human body consists of hundreds, perhaps thousands of different types of cells, each with different morphologies and functions, despite having the same genome.

State utilization of 'hukum adat' and its implication for the Indonesian rule of law

Up to 50% of all children and adolescents growing up worldwide are exposed to at least one form of childhood adversity (CA), which is one of the strongest predictors for later-life psychopathology.

The programme structure of the specialization International Criminal Law can be found on this page. The programme consists of several courses.

The studies presented in the work show the potential of the integrative use of biophysical data in defining the structural basis of protein interactions.

Neurobiological, cognitive and behavioural measurements of normal and abnormal child development.

This thesis investigates opinion dynamics on random graphs through the lens of the voter model, a classical interacting particle system used to describe how consensus emerges in networks.

Ruobin Han defended her thesis on 21 March 2017

Metabolomics is a powerful tool that can provide a comprehensive insight into the complexity of human biology and the pathophysiology of diseases. By analyzing the metabolome, which refers to the complete set of small (endogenous) molecules (with a mass <1500 Da) present within a given biological system,…

This project aims to explore, in general, what explains civil servants’ attitudes and behavior, and, in particular, why some civil servants are more committed to professional norms and public service values – such as impartiality, equity, efficiency, and innovation – than others.

You will develop an understanding of the interconnectedness between the world economy, international law, justice, war and how peace might become more prevalent.

On 22 June, Chalermwut Sriporm defended the thesis 'Franchising legal frameworks: a comparative study of the DCFR, US law and Australian law regarding franchise contracts'. The doctoral research was supervised by Jacob Hijma and Iris Houben.

Promotor: Prof.dr. J. Kuiper, Co-promotor: Saskia C.A. de Jager

Large areas of space are filled by molecular clouds that consist of gas and dust grains that are the remnants of dead stars. When these clouds start collapsing, the decreasing temperature and increasing density cause gas particles to start accreting onto dust grain surfaces.

This thesis describes the Multi-site All-Sky CAmeRA (MASCARA), which consists of two small robotic telescope designed to detect exoplanets around the brightest stars in the sky.

How do humans control their thoughts and actions, and what can high-field brain scanning reveal about the underlying processes?

On the 16th of December, Ruixue Wu successfully defended a doctoral thesis. Leiden University Centre for Linguistics congratulates Ruixue on this achievement!

Medical technology has become an essential part of healthcare. Innovative treatment methods therefore require a new type of medical professional. Someone with medical and technical knowledge, who builds a bridge between technology and patient.

To what extent can digital technologies be considered as authorities?

This article, by Sara Perlstein, explores how perceived social acceptability shapes whether people talk about risks, showing that risk perceptions and conversations are socially negotiated rather than purely individual.

Gaucher disease is a rare metabolic disorder, in which a mutation of the enzyme glucocerebrosidase (GBA1) causes buildup of its substrate glucosylceramide and the deacylated counterpart glucosylsphingosine in lysosomes.

The thesis is about how auxin and AGC kinases regulate male fertility. The main AGC kinases studied in this thesis is PDK1, PDK2 and AGC1.5, AGC1.7.

This research cluster is a part of the Institute of Political Science’s research programme ‘Institutions, Decisions and Collective Behaviour’. Its members study phenomena such as migration, immigration, citizenship, integration, ethnic parties, minority and caste-based politics, borders and migration,…

This thesis advances our understanding of lipid uptake, a vital first step in lipid metabolism, by developing innovative click chemistry-based tools to study how immune cells internalize lipids.

Animal Sciences’ contributions to the Biodiversity & Evolution research theme include evo-devo research, the evolution of cognitive and behavioural traits, and the evolutionary mechanisms of stress adaptation. This research involves both indoor and outdoor studies.

Animal Sciences’ contribution to the Bioactive Molecules research theme includes research on molecules from natural sources, such as plants, insects, and snake venom, with the aim to identify novel anti-cancer, anti-inflammatory, anti-microbial, and anti-diabetic agents.

Lecture

Stefano Pollas master thesis 'Quantum Digital Cooling' has been awarded the Lorentz Master thesis award. The award, 3000 euros and a certificate, has been awarded on 25 November at the Koninklijke Hollandse Maatschappij van Wetenschappen (KHMW) society in Haarlem.

PhD defence

dr. T.C. Streng dr. W. Castryck Prof.dr. P. Stevenhagen