This thesis mainly extends the theory of positive operators on Riesz spaces to a setting of pre-Riesz spaces.

Promotor: A. Doelman, Co-promotor: M.F.E. de Jeu

Complex Organic Molecules (COMs) have been detected in objects across different stages of stellar evolution.

Promotor: S.M. Verduyn Lunel, Co-promotor: S.C. Hille

This book focuses on transnationalism as a key concept to evaluate how Europe responds to cross-border security challenges.

Promotor: R. Verpoorte, Co-promotores: Y.H.Choi, N.R. Mustafa

Promotor: S.M. Verduyn Lunel, Co-promotor: O.W. van Gaans

Polycyclic aromatic hydrocarbons (PAHs) are the most abundant class of organic compounds in space. The PAH field evolves from the constant interaction between experimentalists, theorists, modellers and observers. While laboratory research and quantum chemical calculations together set up the molecular…

Leiden University’s Master of Laws in Air and Space Law (LL.M.) looks at public air law, private air law and space law from a European and an international perspective.

Hoe worden nachtruimtes verbeeld, geproduceerd, ervaren en verteld door migrantengemeenschappen in Europa? Dit onderzoeksproject onderzoekt deze vraag in acht Europese steden: Aarhus, Amsterdam, Berlijn, Cork, Galway, Lissabon, Londen en Rotterdam.

Astronomical observations of cold regions in the universe show a rich inventory of ices. Part of these ices may end up on planets like our own, but in that journey they will be exposed to considerable amounts of radiation.

The sequence-dependence of biomolecular interactions involving nucleic acids and proteins is essential for numerous processes inside the cell. Insights into the underlying molecular mechanisms have been obtained using various biochemical and biophysical methods on two different levels — bulk and sin…

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.

Promotor: Prof.dr. T.H.W. Bäck

In this thesis we study the moduli space of genus g curves, and the differential forms that occur naturally on this moduli space.

Promotor: S.M. Verduyn Lunel, Co-promotores: M.F.E. de Jeu, B. de Pagter

Op 29 mei verdedigde Dimitra Stefoudi het proefschrift 'Juridische en beleidsmatige aspecten van space big data: juridische implicaties van het gebruik van grote hoeveelheden ruimtedata – regulerende oplossingen en beleidsaanbevelingen'. Het promotieonderzoek is begeleid door Steven Truxal en Bart C…

In this thesis we construct an extension associated with the Furstenberg compactification of symmetric space of noncompact type. From this extension we get a cycle in equivariant KK-theory representing the extension. The construction of the extension and the corresponding cycle is a generalization of…

The Standard Model (SM) of particle physics fails to explain several observed phenomena and is incomplete. In order to resolve this problem, one may extend the SM by adding new particles.

The subject of this thesis, ‘Approach to Markov Operators on Spaces of Measures by Means of Equicontinuity’, combines an analytical and probabilistic approach to Markov operators.

This thesis examines silicon pore optics (SPO), a technology that exploits silicon wafers from the semiconductor industry to create extremely high quality X-ray optics, by studying its manufacturing process, applications, and prospects.

The key purpose of this project is to study tautological relations on the level of closed differential forms or even integral cochains (i.e. we don't take classes in cohomology).

Havensteden zijn bijzonder in de wijze waarop ze ruimtelijkheid, economische activiteit en culturele waarden combineren. Het zijn vaak robuuste steden die kansen, rijkdom en innovatie bieden aan hun landen en hun inwoners. Maar havensteden geven ook grenzen weer, wat zich weerspiegeld in gemarginaliseerde…

This research focuses on the distribution of chemical elements in protoplanetary disks, the birthplaces of planets. These disks form around young stars and contain gas and dust, from which planets grow. Ice plays a crucial role in planet formation, aiding the clumping of dust particles and influencing…

We investigate the buildup of galaxies from various vantage points. The first two chapters focus on the stellar content of galaxies, especially the distribution of stellar masses at birth and potential variations therein in various galactic environments.

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

Op 20 juni promoveert Camil Staps. Het Leiden University Centre for Linguistics feliciteert Camil!

Op 18 juni 2019 verdedigde Neta Palkovitz Menashy haar proefschrift 'Regulating a Revolution: Small Satellites and the Law of Outer Space'. Het promotieonderzoek is begeleid door promotoren prof. dr. P.M.J. Mendes de Leon en prof. dr. G. Molier.

The space between the stars isn't simply a void; it also contains substances such as methanol and carbon dioxide. So far, chemical theories have been unable to explain how these substances originate under circumstances that should make it impossible. Fedor Goumans has been awarded a Veni subsidy to…

Antibiotic-resistant bacteria pose a major health threat. Addressing this challenge requires among others the development of new antibacterial compounds. The research described in this thesis focuses on discovering novel antibiotics from soil bacteria, specifically Streptomyces and Paenibacillus.Despite…

Plant diversity is essential for us and our planet as it sustains the stability of our ecosystems, provides vital materials and food to us and supports many ecosystem services.

Promotor: Prof.dr. H.V.J. Linnartz, Co-Promotores: S. Ioppolo, H.M. Cuppen

Het ontwerp voor het METIS-instrument voor de Extremely Large Telescope (ELT) is definitief. De Europese Zuidelijke Sterrenwacht (ESO) heeft groen licht gegeven voor de productie van alle onderdelen van het instrument. Het is het eerste ELT-instrument, ontworpen en te bouwen onder Nederlandse leiding,…

The ongoing increase in antimicrobial resistance combined with the low discovery of novel antibiotics is a serious threat to our health care.

My PhD project studies how the temporally sequential Hox gene expression is regulated during head-tail patterning of the frog embryo.

Over several decades, a variety of computational methods for drug discovery have been proposed and applied in practice. With the accumulation of data and the development of machine learning methods, computational drug design methods have gradually shifted to a new paradigm, i.e. deep learning methods…

Promotor: Prof.dr. H.V.J. Linnartz

Op 5 september 2016 startte de eerste Massive Open Online Course (MOOC) van Space Awareness in lesgeven over de ruimte en astronomie in de klas.

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…

Nieuwe krachtige telescopen, zoals de European Extremely Large Telescope, zullen de atmosferen van aardachtige planeten gaan ontrafelen met behulp van nieuwe waarneemmethoden zoals onder ontwikkeling in Leiden. Zuurstof kan dan mogelijk als eerste bewijs dienen voor buitenaards leven.

In dit artikel onderzoeken de onderzoekers hoe solidariteit begrepen kan worden, rekening houdend met de diversiteit van verhalen, ruimtes, praktijken, lichamen en tijdsperiodes in een stad.

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.

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).

This thesis discusses several questions regarding the double ramification cycle as a Chow class on the moduli space of stable n-pointed genus g curves using tools from so-called logarithmic geometry.

Een uniek kijkje in de keuken van de ruimtevaartechnologie: alumni van de Faculteit der Wiskunde en Natuurwetenschappen en het Natuurwetenschappelijk Gezelschap Leiden bezochten Airbus Defence and Space Netherlands tijdens hun jaarlijkse excursie op vrijdag 22 april.

De Leidse astronoom Huib Jan van Langevelde is benoemd tot directeur van het Event Horizon Telescope (EHT)- consortium. De EHT is een project waarbinnen zo’n 350 wetenschappers uit 18 landen samenwerken. De EHT bundelt de grote ALMA-telescoop in Chili met andere (sub)millimetertelescopen en publiceerde…

Three major cosmology-focused missions are planned for the next decade: the Euclid space telescope, the Vera C. Rubin Observatory in Chile, and the Nancy Grace Roman Space Telescope.

Universiteit Leiden won de Europese ronde in de Manfred Lachs Space Law Moot Court Competitie van het IISL in Rome.