This ecological community has long been known to affect host biology, and their diverse roles have been further clarified in recent years following numerous studies of animal:microbiota interactions in diverse systems.

Stellar feedback is a crucial ingredient in the evolution of galaxies.

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.

In this thesis, we use low-frequency and high-frequency radio observations to address the following questions regarding quasars: is the radio loud/quiet quasar dichotomy real?

Promotor: E. F. van Dishoeck, Co-promotor: C. Walsh

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

Understanding the formation and evolution of planetary systems is one of the most fundamental challenges in astronomy. To directly image and study young exoplanets and the circumstellar disks they form from, dedicated high-contrast imaging instruments are built.

Promotores: Prof.dr. A.G.G.M. Tielens, Prof.dr. L. Kaper (UvA)

In this thesis, the research focuses on the properties of dark matter and dark matter haloes and how they connect with the galaxies we can observe in the Universe.

Organisms often need to adapt more efficiently and devise new strategies for surviving difficult ecological circumstances.

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

Following the Big Bang, structure in the Universe started collapsing under the force of gravity. This resulted in the formation of the first stars, galaxies and clusters of galaxies.

Promotor: Koen Kuijken Co-promotor: Henk Hoekstra

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

This thesis investigates how quantum, quantum-inspired, and hybrid quantum-classical computation can enhance key points of the automated machine learning (AutoML) pipeline under the constraints of noisy intermediate-scale quantum (NISQ) devices.

Nowadays, it is well known that hydrogen and helium (and small traces of lithium and beryllium) were created shortly after the Big Bang, while the heavier elements are created in the cores of stars at different evolutionary stages. When these stars explode as supernovae, they expel metals synthesised…

This thesis utilises the exceptional sensitivity and resolution of LOFAR to explore the low-frequency Universe, while simultaneously advancing the telescope's capabilities to enable new scientific discovery.

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

This dissertation presents the results of the importance of creativity for ICT-students of Dutch universities of applied sciences (in Dutch: hogescholen), and the functioning of training courses that aim to promote creative abilities is highlighted.

Promotor: Prof.dr. F. den Hollander, G.Maillard

Promotores: Prof.dr. G.W. Canters, Prof.dr. T.J. Aartsma

The Copenhagen interpretation of quantum mechanics states that a measurement collapses a wavefunction onto an eigenstate of the corresponding measurement operator.

Multiple stars, that is two or more stars composing a gravitationally bound system, are common in the universe.

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 increasing competition in the automotive industry requires the tailored, swift development of technologically sophisticated vehicles. Therefore, the computationally expensive state-of-the-art simulation technologies are combined with optimization algorithms. An example of a real-world optimization…

Antimicrobial drugs constitute a fundamental part of modern medicine. The global rise in antimicrobial resistance poses a major threat to global health.

Protein–protein complexes are formed via transient states called encounter complexes that greatly influence the formation of the stereospecific complex.

The field of exoplanet research is rapidly advancing through the development of new technology, observing techniques, and post-processing methods.

Promotor: Prof.dr. S.F. Portegies Zwart

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.

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

This thesis focuses on the X-ray spectral analysis of merging galaxy clusters and the plasma code development for future high-resolution X-ray spectroscopy observations.

Promotor: R. Gill, Co-promotor: P. Massart

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.

Producing green energy has become the main goal in our society in the search of reducing or eliminating the carbon emission from fossil fuels.

Studievoorlichting

Leidse archeologen hebben een aantal botfragmenten geïdentificeerd, die twee jaar geleden in Duitsland zijn opgegraven: ze zijn afkomstig van een sabeltandtijger. Het bleken delen van de schedel van de prehistorische katachtige te zijn, van meer dan 300.000 jaar oud.

Een internationaal team met onderzoekers uit Leiden heeft ontdekt hoe een bacterie een intern systeem heeft herschikt om grip op beweging te krijgen. Gecontroleerde beweging is heel belangrijk bij het binnendringen van een gastheer, met mogelijk ziekte tot gevolg. Publicatie op 27 april in Nature Co…

Promotie

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Promotie

Women In International Security (WIIS) is a global organisation dedicated to advancing the leadership and professional development of women in the field of international peace and security. As part of her research on women, peace and security, Dr. Vanessa Newby at the Institute for Security and Global…

Dynamical systems describe the evolution of objects in a space over time and may be used to model physical phenomena. Due to this, much research is dedicated to understanding the mathematics of dynamical systems.

Microbial rhodopsins are photosensitive pigments implemented in the growth and adaptation of a large population of microorganisms.

OB associations are loose groups of young, massive stars. They constitute the last stage of the massive starformation process, and the context in which new stars are formed.

Detecting planets during their formation stages is crucial for understanding the history and diversity of fully developed planetary systems like our own. However, observing young planets directly is challenging because they are often deeply embedded within their host protoplanetary discs, rich in gas…

Alle masterstudenten Politicologie sluiten hun studie af met een eindscriptie. Daarin tonen zij hun academische vaardigheden en persoonlijke interesse. Voor sommigen is de scriptie een ‘laatste horde’; anderen zien het eindwerkstuk al een eerste stap in hun ontwikkeling als wetenschappers. Als erkenning…

Afgestudeerden van de bachelor Security Studies aan de Universiteit Leiden hebben toegang tot diverse masterprogramma's en uitstekende carrièrekansen. Ontwikkel je als beveiligingsstrateeg en vergroot je kansen op een succesvolle carrière in zowel de publieke als private sector.