The formation and evolution of galaxies is fundamentally driven by the formation of new stars out of cold gas.

Paul Hudson, universitair hoofddocent Fysische Geografie bij Leiden University College, onderzoekt de menselijke invloeden op rivieren in laagland in zijn nieuwe boek.

Understanding how galaxies form, interact, and evolve comes largely from comparing theory predictions with observational data. Numerical simulations of galaxies provide the most accurate approach to testing the theory, as they follow the non-linear evolution of gas and dark matter in great detail and…

Promotor: J.N. Kok, Co-promotor: M.S. Lew

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

Promotor: S.M. Verduyn Lunel

Promotor: W.Th.F. den Hollander Co-Promotor: F.M. Spieksma

Aan de hand van een reeks case studies in Irak, Moldavië en Servië gedurende het post-Koude Oorlogstijdperk, onderzoekt dit boek asymmetrische conflicten waarbij de strijdende partijen een grote ongelijkheid in machtsposities vertonen.

Developing robust algorithms and theory for establishing cause-effect relationships from observational data that scale up to large data sets

In this thesis I highlight the applications of Oxford Nanopore Technologies (ONT) sequencing. This technique is a relatively new approach in the sequencing field, where nanopores are embedded in a membrane, DNA molecules are pulled through nanopores and an electrical current serving as the sequencing…

Laatste technologische ontwikkelingen op het gebied van datamining en profilering.

Promotor: Prof.dr. T. Hankemeier, Prof.dr. J.C.T. Eijkel (Twente University)

This thesis focuses on data found in the field of computational drug discovery. New insight can be obtained by applying machine learning in various ways and in a variety of domains. Two studies delved into the application of proteochemometrics (PCM), a machine learning technique that can be used to…

Why do black holes emit thermal radiation? And how does a closed quantum system thermalize?

What performance criteria does a new technology have to fulfill in order to be added to the list of future energy options and what constraints exist in terms of broad market penetration?

This thesis is divided into two parts. In Part I we study metastability properties of queue-based random-access protocols for wireless networks. The network is modeledas a bipartite graph whose edges represent interference constraints. In Part II we study spectra of inhomogeneous Erdős-Rényi random…

Welke factoren (mens-dimensie en carnivoor-gerelateerd) zijn bepalend voor de menselijke tolerantie ten opzichte van grote carnivoren en voor de overlevingskansen van grote carnivoren in bossen met meervoudig gebruik?

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 Low Frequency Array enables studies of low-frequency carbon radio recombination lines with unprecedented sensitivity, spectral and spatial resolution.

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.

Antropoloog Erik de Maaker heeft samen met historica Sanjukta Sundarason een subsidie van het Leidse profileringsgebied Asian Modernities and Traditions gekregen voor onderzoek naar migratie, etniciteit en natie in Zuid-Azië.

De ontwikkeling en bouw van de Cold Optics Bench van het MATISSE-instrument dat onder leiding stond van de Nederlandse Onderzoekschool voor Astronomie (NOVA), is afgerond. Deze Nederlandse bijdrage werd op donderdag 10 april 2014 op de Hannover Messe in Duitsland door ir. Felix Bettonvil van de Leidse…

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

Promotor: Prof.dr. A.G.G.M. Tielens

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

Thermodynamics is one of the founding scientific pillars that has helped us better understand heat engines, biology, ecosystems, and even black holes. While it fundamentally describes large systems by examining the bulk behavior of their constituents, it is anchored in the statistical equivalence of…

Galaxy intrinsic alignments induce a major astrophysical contamination to weak gravitational lensing measurements and need to be modelled and mitigated when extracting cosmological information from such measurements.

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 is about cosmological inflation and its relation to observations.

The ultimate goal of cosmologists is to find a cosmological model able to explain the current observational data.

Galaxies form and live inside dark matter haloes. As a consequence, they are exposed to the tidal fields generated by the surrounding matter distribution: this imprints a preferential direction to the galaxy shapes, which leads to a coherent alignment on physically close galaxies, called intrinsic a…

Promotores: Prof.dr. J. Schaye, Prof.dr. S.D.M. White (MPA Garching)

Promotor: Prof.dr. G.R. de Snoo, Prof.dr. G.A. Persoon, Co-promotor: H.H. de Iongh

In this thesis, I studied the origin and evolution of the non-thermal radiation in merging galaxy clusters.

Promotor: Promotor: W.Th.F. den Hollander, Co-promotor: V. Sidoravicius.

High-angular-resolution observations of the circumstellar material have uncovered numerous and very diverse substructures in protoplanetary discs, raising the question of whether they are caused by forming planets or other mechanisms.

The first direct detection of gravitational waves opened the possibility of mapping the Universe via this new and independent messenger.

I have studied the hot, diffuse gas around and between galaxies. Specifically, I have used the EAGLE numerical simulations of galaxy formation to predict the properties of this gas, and I have used those properties to predict specific observables: soft X-ray absorption and emission lines.

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.

Sterrewacht Leiden is het sterrenkundig instituut van de Faculteit der Wiskunde en Natuurwetenschappen van de Universiteit Leiden.

Promotor: Prof.dr. W.Th.F. den Hollander, Co-promotor: R. Fernandez.

Stochastic resetting is simple enough to be approached analytically, yet modifies stochastic processes in a non-trivial way.

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.

The parabolic Anderson model (PAM), which is the Cauchy problem for the heat equation with random potential. The PAM is a mathematical model that describes how mass (i.e. matter or energy) flows in a medium in the presence of a field of sources and sinks.

Large carnivore population is globally declining as a result of the fragmentation of habitat, large prey depletion and retaliatory killing by pastoralists.