Interactive exploration of large volumes of data is increasingly common, as data scientists attempt to extract interesting information from large opaque data sets. This scenario presents a difficult challenge for traditional database systems, as (1) nothing is known about the query workload in advance,…

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: J.N. Kok, Co-Promotor: A.J. Knobbe

Large carnivores and humans, along with their livestock, have co-existed for thousands of years. However, human population growth and an increase in economic activities are modifying the landscape for large carnivores and their prey.

Promotor: W. T. F. den Hollander, F. H. J. Redig

Promotor: Prof.dr. B.R. Katzy

Promotores: Prof.dr. G. Miley & Prof.dr. J.M. van den Broek

Promotor: J.N. Kok, P.E. Slagboom Co-promotor: J.F.J. Laros

This thesis focuses on important life history traits and their trade-offs using two hexapod models. Particularly, the trade-off between immune defense and embryonic developmental speed is a central theme of this study.

Promotor: Prof.dr. J.N. Kok, Co-Promotor: W.A. Kosters

Promotor: M.L. van Hecke

Plants produce an astonishing variety of secondary metabolites (SMs) which are thought to play vital roles in the fitness of plants through ecological interactions.

Breast cancer (BC) is a clinically and biologically heterogeneous disease.

Conventional food supplies procured from rural areas are increasingly vulnerable to disruptions caused by extreme weather, geopolitical instability, and logistical bottlenecks.

Promotor: Prof.dr. M. Franx, Co-Promotor: Rychard Bouwens

In this thesis new methodologies are developed for the detection and systematic study of radio sources in the early universe. This allows us to gain a deeper understanding of the formation and evolution of galaxies, the activity of supermassive black holes, and the final phase transition of our universe:…

Promotores: Prof.dr. M. Franx, Prof.dr. P.G. van Dokkum (Yale University)

Exoplanets close in to their host star receive high levels of extreme ultraviolet (EUV) irradiation, capable of heating and ultimately driving the hydrodynamic escape of their atmospheres.

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

Promotor: Prof.dr. G.R. de Snoo

All the data stored and processed by our computers is encoded as sequences of zeros and ones, called bits. Quantum computers offer an alternative to this traditional way of encoding and manipulating information.

Promotor: A. Doelman, Co-promotores: P.J.A. van Heijster; A. Zagaris

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

Leiden University offers a unique range of summer courses where you can broaden or deepen your knowledge or share your expertise with fellow students. The choice of academic courses is very diverse, ranging from Law, Big Data, Languages and Linguistics to Maths and Natural Sciences, Biology, Biomedical…

BlaC is the β-lactamase of Mycobacterium tuberculosis. We show that it can recover from inhibition by clavulanic acid and that phosphate helps it do so.

The Sun and all the stars in the night sky reside in the Milky Way galaxy. In the at-rest reference frame of the Galaxy, typical stars travel with velocities of about 100-200 kilometres per second.

This thesis contributes to studying primordial cosmology theories and their detectability in future observations.

Er wordt een expertise groep voor de Atacama Large Millimeter / Submillimeter Array (ALMA) gehuisvest in de Sterrewacht van Leiden. Hiermee is een bedrag is gemoeid van 0,5 miljoen euro per jaar.

Promoveren in wat voor deeltjesfysici het Mekka van de moderne wetenschap is: CERN. Voor de bijna afgestudeerde natuurkundige Marco van Woerden wordt deze droom binnenkort werkelijkheid, en mag hij zich in Genève drie jaar lang bezighouden met de fundamenten van de wetenschap.

Het DESHIMA-instrument van Nederlands-Japanse makelij heeft de eerste praktijktests doorstaan bij het meten van de afstanden en leeftijden van verre sterrenstelsels. De kern van het instrument is een chip ter grootte van twee euromunten die 49 tinten ver-infraroodlicht meet. De ontwikkelaars van de…

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

The formation of stars and planets happens over multiple scales, which can interact. In particular, planet formation happens in the dense, complex environment of star forming regions.

Evolution acts via mutations in amino acid sequences. Substitution of essential amino acids leads to a nonfunctional protein. l.

In this thesis we use state-of-the-art observations and simulations to provide the best constraints to date on the HVS ejection rate and constraints on the stellar content and dynamics at the GC, including the progenitor binary populations and their star formation history.

De universitaire sterrenkunde in Nederland staat in de top van de astronomische wereldranglijst. Deze conclusie komt naar voren uit een recente evaluatie van de Nederlandse Onderzoekschool voor Astronomie (NOVA) en de astronomische instituten van de Universiteit Leiden, Universiteit van Amsterdam, Rijksuniversiteit…

This thesis explores the theoretical and observational properties of distant massive galaxies that harbour active black holes in their centres and shine brightly at radio wavelengths.

This thesis focus on the interaction between M dwarf stellar winds and Galactic cosmic rays and the possible effects on the habitability of exoplanets.

On the largest scale, the Universe resembles a cosmic spiderweb. Most galaxies coexist in small groups within the threads of this web. At the nodes of the threads are enormous groups of galaxies forming the largest structures in the universe still held together by gravity: clusters of galaxies.

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.

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

The focus of this thesis is how stars like our Sun and planets like Jupiter, Saturn, and Earth are formed.

This thesis describes the development and validation of new high-contrast imaging techniques, with the ultimate goal of enabling the next generation of instruments for ELT-class telescopes to directly image Earth-like extra-solar planets orbiting around nearby stars.

Over the last three decades, the discovery of exoplanets has revealed the boundless variety of worlds beyond our own Solar System⁠. Majority of planetary systems contain short-period planets that are larger than Earth but smaller than Neptune⁠.

Voormalig promovendus Cameron Mackie krijgt niet één, maar twee proefschriftprijzen voor zijn proefschrift over het aromatische universum. Door zijn werk kunnen we binnenkort misschien een virtueel ‘snuifje’ van de ruimte nemen. ‘Deze moleculen in de ruimte ruiken waarschijnlijk als een grote houtsk…

Van onderwijs tot een verrijkende ervaring

Wat doet de Universiteit Leiden om haar gebouwen en campussen toekomstbestendig en onafhankelijk van fossiele energie te maken?

Over the past years it has been discovered that the population of extra-solar planets is large and diverse.

In this thesis chemical and physical processes in the ice mantles on interstellar dust grains are studied.

Promotor: E. Gittenberger, Co-promotores: B.W. Hoeksema; L.P. van Ofwegen