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

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

A century ago, it was unclear whether the stars in the sky were clustered in groups, or widely spread in the universe.

Promotor: Prof.dr. H.J.M de Groot, Co-Promotor: A. Alia

For centuries astronomers studied the Universe by collecting light. Nowadays, we are living in times of great technological advancements, which allow us to explore our Universe in a new way - though gravitational wave radiation.

The elementary excitations of magnets are called spin waves, and their corresponding quasi-particles are known as magnons. The rapidly growing field of Magnonics aims at using them as information carriers in a new generation of electronic devices, (almost) free of electric currents.

In this thesis, we describe the latest advances in SQUID-detected Magnetic Resonance Force Microscopy (MRFM).

In this thesis, we show how MRFM can usefully contribute to the field of condensed-matter.

Promotor: T.H. Oosterkamp

There are many interpretations of quantum mechanics, and ultimately experiments are needed to verify or falsify these interpretations.

Promotor: W. Jaffe, Co-promotor: K. Meisenheimer

One of the most important puzzles in modern astrophysics is the nature of dark matter.

This thesis investigates the relations between metabolism and anatomy through the use of Magnetic Resonance Imaging (MRI).

Huub de Groot

Promotor: Prof.dr. H.W. Lenstra

Promotor: H.W. Lenstra

Promotor: H.W. Lenstra, Jr., Co-promotor: B. de Smit

Promotor: A. Achúcarro, Co-Promotor: J.W. van Holten

This thesis is about cosmological inflation and its relation to observations.

Artin L-functions associated to continuous representations of the absolute Galois group G_K of a global field K capture a lot of information about G_K as well as arithmetic properties of K.

Promotor: Prof.dr. P. Stevenhagen, Co-Promotor: J.H. Evertse

Promotor: V. Vitelli, Co-promotor: J. Paulose

Promotores: T.H. Oosterkamp, N. de Jonge

Promotor: K.E. Schalm, Co-promotor: S.S. Lee

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

Promotor: Prof.dr. P. Stevenhagen, Prof.dr. K. Belabas (Univ. de Bordeaux)

In this thesis, we show that we can use Shimura’s CM theory to explicitly compute the Hilbert class field of any primitive quartic CM field.

The thesis describes terrestrial field trials aimed to detect side-effects of pesticides within the framework of pesticide registration procedures. Field trials were developed using vascular plants Brassica napus and Poa annua, caterpillars Pieris brassicae and effects on decomposition were studied…

Promotores: W.J.G.M. Peijnenburg, G.R. de Snoo, Co-promotor: M.G. Vijver

In this work we describe three methods to improve the performance of Quantum Field Theory calculations.

Promotor: Prof.dr. M. de Jong

Promotor: S.J. Edixhoven

This thesis describes the implementation and on-sky demonstration of high-resolution integral-field spectroscopy for extreme adaptive optics systems that are used to find and characterize exoplanets.

A management strategy has been developed for field margins to reduce pesticide drift to non-target areas and to promote biodiversity on arable land. To this end, 3 and 6 m wide strips along the edges of winter wheat, sugar beet and potato crops have been left unsprayed with herbicides and insecticides…

Governance and Global Affairs, Leiden University College The Hague

Binnen het Graduate Programme van Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) is de aanvraag voor de 'Netherlands Magnetic Resonance Research School' gehonoreerd. Deze onderzoeksschool is een van de 18 gehonoreerde aanvragen. Vier Leidse Graduate Schools zijn gehonoreerd.

The redox-conversion reaction of metal-disulfide and metal-thiolate complexes are important, as they may shed light on electron-transfer reactions that often occur in Nature.

Promotor: S.J. Edixhoven Co-promotor: L. van Geemen, P. Parent

Wiskunde en Natuurwetenschappen

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

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

Promotor: A. Achúcarro, Co-promotor: A. Boyarsky

Galaxies are environments where gas coalesces, cools, and is converted into stars. However, it remains unclear the exact mechanisms through which galaxies acquire, redistribute and lose their gas.

A plasma is an ionized gas with very low electrical resistivity. As such, magnetic field lines are 'frozen in' and move with the fluid. Magnetic field lines that are linked, knotted and tangled, cannot be undone by the fluid motions.

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

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

Governance and Global Affairs, Institute of Security and Global Affairs