The following report discusses a survey on the topic of the Sustainable Development Goals that was distributed among researchers at Leiden University in the month of November 2021.

In this thesis we study bistable reaction-diffusion equations on lattice domains.

Op 7 december 2021 verdedigde Georgina Kuipers het proefschrift 'Beschadigd vertrouwen'. Het promotieonderzoek is begeleid door prof.mr. W. den Ouden en prof.dr. M.A. van der Steen (EUR).

Promotor: Prof.dr. E Gittenberger, Co-Promotores: C.H.J.M. Fransen, B.W. Hoeksema

This dissertation presents new cryptographic protocols, which can be divided into two families.

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

Until the 1990s, the only known planets were those in our Solar System. Three decades later, several thousand exoplanets have been discovered orbiting stars other than the Sun, and substantial efforts have been made to explore these strange new worlds through spectroscopic analyses of their atmosphe…

Promotores: P. Stevenhagen, E. Fouvry (Univeriste Paris Saclay)

This proposed research uses ego-documents from visual artists that were not intended for publication to reassess the scholarly debate on the demise of the Russian Avant-garde aesthetic in the twenties and early thirties of the 20th century.

Low-mass main-sequence stars like our Sun are continuous sources of outflowing hot magnetised plasma. In the case of the Sun, this is known as the solar wind, whereas for other stars they are called stellar winds.

There is concern about the threat that nanoplastics (NPs) may pose to both wildlife and humans. This thesis explores the mechanisms of toxicity of polystyrene nanoparticles (PS-NPs) in chicken embryo.

Promotor: Jaap Brouwer, Co-promotor: Remus Th. Dame

Marine sponges are important members of reef ecosystems, as they play ecological roles that are essential for the health of the reef.

Glycoside hydrolases (glycosidases/GHs) are widely abundant enzymes in all kingdoms of life and are important biocatalysts that catalyze the hydrolysis of glycosidic linkages in oligo/polysaccharides, glycoproteins and glycolipids with tremendous efficiency

Science is typically a patchwork of research contributions without much coordination. Especially in clinical trials, the follow-up studies that we do fail to be the most promising.

Promotores: G. Persoon, R. Schefold

Plants are colonized by an astounding number of microorganisms that can provide different life-support functions, including nutrient acquisition and protection against (a)biotic stresses like drought or pathogen attack.

Natural resources often stretch across borders that separate modern nation states. This can create conflict and limit opportunities for regulated consumption of their goods and services, but also provide opportunities for joint multinational efforts that exceed single country capabilities.

One of the main challenges in the development of an effective anti-cancer vaccine is the generation of an adequate and directed cellular immune response.

Streptomyces are bacteria abundant in soil that participate in diverse and complex interactions. These bacteria are the main producers of the antibiotics we currently use in the clinic.

Technologies that help to enhance our educational environments can be found everywhere.

In today's volatile market environments, companies must be able to continuously innovate. In this context, innovation does not only refer to the development of new products or business models but often also affects the entire organization, which has to transform its structures, processes, and ways of…

Human language is constantly evolving with its linguistic structure being shaped by language users at both individual and population levels. Focusing on the interplay between processes of language acquisition and communicative need in shaping human languages, this thesis introduces a novel computational…

Wat is effectief kijkgedrag voor taalleerders en hoe kunnen leerkrachten taalleerders effectief trainen om effectieve kijkstrategieën toe te passen die hun leerproces maximaliseren bij het bekijken van ondertiteld materiaal?

Onderzoeksmaterialen van het Navigatie Lab Leiden

The main objective of this thesis was to develop clinically relevant survival models for patients with high-grade soft tissue sarcoma of the extremities, in particular the development and validation of prediction models for use in clinical practice.

The basic program comprises a total of twelve courses organized by the Research School, that have been purpose-developed for training and support of PhD students and Research MA students who specialize in Medieval Studies (history, art history, and literary history, in particular).

In meta-analysis, heterogeneity often exists between studies. In such cases, it is essential to investigate the sources of heterogeneity and understand the relationship between effect size and study characteristics (i.e., moderators).

Even though more than 4000 extra-solar planets are known today, only a small fraction of these has been captured in an image. To better understand the planet formation mechanisms in solar-like environments we started the Young Suns Exoplanet Survey (YSES).

One of the key discoveries in exoplanet research over the past decade is the abundance of small planets in our Milky Way. Despite their high numbers, our understanding of their atmospheres remains limited, and it is unknown if they possess atmospheres at all.

Supervisor: S.F. Portegies Zwart Co-Supervisor: A.G.A. Brown

Promotor: Prof.dr. W.T.F. den Hollander

This thesis involves three topics: benchmarking discrete optimization algorithms, empirical analyses of evolutionary computation, and automatic algorithm configuration.

Enkele keren per jaar organiseert het Europa Instituut een ‘Meet the Author’ bijeenkomst. In het kader van deze nieuwe lezingenreeks komen externe academici naar Leiden om te spreken over een recente publicatie. ‘Meet the Author’ bijeenkomsten vangen aan met een gesprek tussen een lid van het Europa…

Actuele informatie over ICT-storingen en gepland onderhoud.

The high velocity tail of the total velocity distribution of stars provides essential insight into fundamental properties of the Galaxy.

Promotor: Prof.dr. E.F. Smets. Co-promotores: B. Gravendeel, F. Pupulin

Prof.dr. J. Memelink

Streptomyces bacteria are a valuable source of natural products, many of which are used in the clinic or in biotechnology.

Op maandag 19 mei 2025 organiseert Website Application Services van het ISSC in samenwerking met SC&M een Webinar Universitaire Website[s]. Tijdens dit online web event wordt je o.a. ge-update over diverse inhoudelijke zaken die voor jou als webredacteur belangrijk kunnen zijn! Ga via deze link…

Women Writing Mexico (WWM) is a network of women and men concerned with the human rights crisis in Mexico and more specifically, with the impact of structural forms of poverty, everyday violence, and discrimination based on gender, race, social class, and ethnicity, that particularly have an impact…

With increasing carbon dioxide levels in the atmosphere and their detrimental effect on the global climate, modern society needs to push for more renewable energy sources. Storing widely accessible and abundant solar energy in chemical bonds in the form of molecular fuel via artificial photosynthesis…

A remarkable population of short period transiting rocky exoplanets with equilibrium temperatures on the order of 2,000 K has recently been discovered.

A common method to solve expensive function evaluation problem is using Bayesian Global Optimization, instead of Evolutionary Algorithms.

Overzicht van de vacatures bij de afdeling Economie.

Time-series forecasting through modelling sequences of temporally dependent observations has many industrial and scientific applications. While machine learning models have been widely used to create time-series forecasting models, creating efficient and performant time-series forecasting models is…

Op maandag 19 mei 2025 organiseert Website Application Services van het ISSC in samenwerking met SC&M een Webinar Universitaire Website[s]. Tijdens dit online web event wordt je o.a. ge-update over diverse inhoudelijke zaken die voor jou als webredacteur belangrijk kunnen zijn! Ga via deze link…

Grote techbedrijven, zoals Google, Facebook en Apple, moeten verplicht hun data delen met nieuwkomers en concurrenten. Hiervoor pleiten wetenschappers en onderzoeksbureau TNO in een hoorzitting in Tweede Kamer. Tom Ottervanger verwacht dat het heel lastig gaat worden om dit te verplichten.

Onderstaand een overzicht van alle vakken die door de afdeling Economie worden verzorgd.

In this dissertation (titled: Exploring the Synergies between Transfer in Reinforcement Learning and Procedural Content Generation) we explore how the two research fields named in the title, namely Transfer in Reinforcement Learning (TRL) and Procedural Content Generation (PCG) can synergize togethe…