Tomography is a powerful technique to non-destructively determine the interior structure of an object.Usually, a series of projection images (e.g.\ X-ray images) is acquired from a range of different positions.

Ice, the solid state of water, plays an important role on our planet as well as the entire universe.Despite the fact that an individual water molecule has a very simple structure, its chemical bonding in the solid phase can be surprisingly complex.

This thesis studies the geometry of representation varieties and character stacks. These are spaces parametrizing the representations of a finitely generated group, typically the fundamental group of a compact manifold, into an algebraic group G.

Promotor: C.J. ten Cate

Industrial manufacturing processes, such as the production of steel or the stamping of car body parts, are complex semi-batch processes with many process steps, machine parameters and quality indicators.

Promotores: Prof.dr. G.A. van der Marel, M. van Heel

Vast, often populated, areas in dryland ecosystems face the dangers of desertification.

We explored the Universe using weak gravitational lensing, a phenomenon that occurs when light from distant galaxies is bent by the gravitational fields of closer cosmic objects, much like how a lens distorts light.

Schistosomiasis is an acute and chronic disease caused by blood dwelling parasitic trematodes of the genus Schistosoma, and it is classified as the second most socioeconomically devastating parasitic disease, second only to malaria.

This thesis discusses the physical and chemical processes than influence the composition of forming planets.

In this thesis integral points on affine del Pezzo surfaces are studied.

Universitair docenten Bart van der Boom en Patrick Dassen maken kans op de Libris Geschiedenis Prijs 2022. Hun beider boeken staan op de shortlist.

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

Quantum computers are a proposed fundamentally new type of computer. They aim to perform some computations much faster than previously possible by exploiting phenomena at the quantum scale, called superposition and entanglement.

Indigenous Latin American artifacts have attracted the interest of Europeans since the earliest moment of contact between Europeans and the Indigenous peoples of the Americas. The ERC-funded BECACO project uses an innovative multidisciplinary framework to investigate the provenance of ethnographic and…

Leids onderzoeker Ethan Mark heeft een missie, zo vertelt hij in alumnimagazine Leidraad. Hij wil dat we onze eurocentrische bril afzetten als we de Tweede Wereldoorlog bestuderen. Lang hebben we onszelf centraal gesteld. Na 75 jaar wordt het tijd om naar de verhalen van de rest van de wereld te lui…

Op 8 juli 2020 verdedigde Andres Sarmiento Lamus zijn proefschrift 'The Proliferation of Dissenting Opinions in International Law'. Het promotieonderzoek is begeleid door promotoren prof.dr. L.J. van den Herik en prof.dr. Y.A.A.S. Radi (UCLouvain).

Nanoparticles can be used as delivery systems for both small molecules and macromolecules such as proteins, peptides or oligonucleotides. This thesis focuses on the use of liposomes, nanometric vesicles formed by a lipid bilayer enclosing an aqueous core. Liposomes are highly versatile delivery syst…

Although plant domestication has significantly altered crop genetics and phenotypes, its effects on the taxonomic and functional diversity of plant-associated microbiomes are not well understood.

The zoo of detected exoplanets reveals both the uniqueness of our own Solar System and the complexity of planetary system formation, sparking fundamental questions about how planetary systems form and evolve.

Op 15 augustus was de Nationale Herdenking waarbij men stilstaat bij het einde van de Tweede Wereldoorlog voor het Koninkrijk der Nederlanden. Emeritus hoogleraar Koloniale en postkoloniale geschiedenis Gert Oostindie verscheen in diverse media om over de herdenking te praten.

Universitair docent Bart van der Boom verscheen in verschillende media om te vertellen over zijn nieuwe boek over de Joodse Raad. In het boek legt hij uit waarom de Joodse Raad hielp bij de deportatie van de Joden.

Sinds de Tweede Wereldoorlog spelen inlichtingen- en veiligheidsdiensten een belangrijke rol in de beleids- en besluitvorming, met name waar het gaat om de nationale veiligheid van een staat. In dit minorprogramma bestuderen we zowel de organisaties, hun werkmethoden, hun analysetechnieken, als de politieke,…

In this thesis, classes of strongly interacting quantum field theories, have been studied.

Rechtendecaan Rudolph Cleveringa wordt dankzij zijn protestrede tegen het ontslag van zijn Joodse collega hét symbool van het Leids verzet tegen de nazi’s. Maar ook andere moedige hoogleraren mogen niet vergeten worden: wat deden Ben Telders, Ton Barge en Lambertus van Holk?

Atoms and molecules are the basic units of matter. If we keep dividing a bar of gold or a glass of water into smaller parts, at the end we are left with a single gold atom or a water molecule.

Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink

Image segmentation is a fundamental task in computer vision, with applications ranging from medical diagnostics to archaeological research.

This thesis explores different avenues to develop insurmountable antagonists for CC Chemokine Receptors, such as CCR1, CCR2 and CCR5.

Healthy aging is one of the prime goals in today's society and atherosclerosis is among the greatest causes of morbidity in elderly. Cardiovascular disease patients receiving treatment are often of advanced aged and have an aged immune system, which limits translating experimental findings to the pa…

Promotores: Prof.dr. E.F. van Dishoeck, Prof.dr. C.P. Dullemond

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

A dense region of a gaseous and dusty cloud collapses to form a protostar surrounded by a disk and an envelope. This thesis uses both observations and models to study physical and chemical conditions of these protostellar systems which are likely where planets start to form.

Promotors: W. Jiskoot; G.J. Witkamp, Co-promotor: M.R. Nejadnik

Promotor: Prof.dr. M.L. van Hecke

Developing new medicines is one of modern science's most significant hurdles, a process marked by high costs, long timelines, and frequent failures of promising candidates.

Climate change is one of the largest challenges faced by humanity. To combat this research into alternatives to fossil fuels is ongoing. Dihydrogen is considered a good alternative fuel, since its burning only forms water.

In this thesis, I study the formation of large-scale structure and the physics of particle acceleration at large scales (~Mpc).

Promotoren: R. Tijdeman, A.K. Lenstra, Co-promotor: H.J.J. te Riele

Promotor: M.K. Richardson, Co-Promotor: F. Witte

Increasing the efficiency of gene targeting (GT) as a genome editing tool in plants has been an important goal in plant biotechnology.

At the largest scales, two ingredients dictate the distribution of matter in the Universe. The first is dark matter, acting as an invisible scaffolding held together by gravitational forces.

Promotor: H.J.A. Röttgering, Co-promotor: M. Haverkorn

The ability to count is a property not often attributed to materials, despite the abundance of memory in materials. Regardless of how a material stores information, it is often difficult to retrieve exactly ‘what’ a material remembers.

Promotor: J.G.E.M. Fraaije, Co-Promotor: A. Kros

Promotor: J.P. Abrahams, Co-promotor: T. Grüne

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

This thesis addresses the problem of designing performance and energy efficient embedded streaming systems, that is, systems which process a stream of input data coming from the environment and generate a stream of output data going into the environment.

LCA has become an important method to study environmental impacts of human activities. Still, there are several methodological issues in LCA that can adversely affect the results reliability.

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.