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

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…

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.

Galaxies form and evolve through close interaction with their surroundings. As a result, the heavy elements ('metals') that are synthesized in stars, are found both inside and outside galaxies.

Within the field of astronomy, understanding how galaxies grow and evolve from the Big Bang to the present day is a challenging and complex question.

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

In the past decade many population studies have been performed with the Atacama Large Millimeter/submillimeter Array (ALMA) to understand the bulk properties of protoplanetary disks around young stars. These population studies mostly consisted of low mass stars, with relatively few of the disks around…

This thesis investigates how galaxies form and what diversifies the evolutionary histories of galaxies.

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

Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: G.J. Herczeg

One of the key quests in astronomy is to study the growth and evolution of galaxies across cosmic time. Radio observations provide a powerful means of studying the formation of stars and subsequent buildup of distant galaxies, in a way that is unbiased by the presence of dust.

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.

In dit onderzoeksproject doen we onderzoek naar spreekvaardigheidsonderwijs, gericht op de bovenbouw van havo en vwo in Nederland.

To address the fundamental questions of how life on Earth emerged and how common life may be in the Universe, it is crucial to know the chemical composition of the planet-forming material.

Promotor: J. Schaye

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

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: Prof.dr. E.F. van Dishoeck

Feedback van medestudenten op schrijfwerk is net zo leerzaam als die van docenten.

Wetenschappers bij de Leidse Sterrewacht onderzoeken de oorsprong van sterren en hun planetenstelsels. Ze detecteren en karakteriseren planeten rondom andere sterren (exoplaneten). Ze onderzoeken hoe sterren en planeten ontstaan. En ze volgen moleculen van interstellaire wolken tot planetenstelsels…

Promotores: Prof.dr. F.P. Israel, Prof.dr. P.P. van der Werf

Promotor: Prof.dr. E. F. van Dishoeck

Dit proefschrift wil een geïntegreerd kader voor de praktijk van peer feedback van leraren bieden, en een diepgaand begrip van peer feedback van leraren in de context van het Chinese beroepsonderwijs.

Het is niet altijd duidelijk hoe effectief hoorcolleges zijn. Dat komt onder andere door het eenrichtingsverkeer van informatie: de docent vertelt, de studenten luisteren. Met technologie zoals stemkastjes kan de docent direct informatie krijgen over of de studenten de stof begrijpen. Vervolgens kan…

Promotor: Roeland M.H. Merks

The origin and evolution of galaxies are closely tied to the cyclic feedback processes between stars and the interstellar medium (ISM).

Teaching Fellows presenteren hun projecten op het gebied van self & peer feedback.

Promotor: G.P. van Wezel

Hoe kunnen docenten de gespreksvaardigheid in MVT van de individuele leerling in klassen van 30 verbeteren?

Didactiek

The solar system was formed approximately 4.56 billion years ago. Despite the numerous theories that have been developed over the years, the formation and evolution of the solar system still remain unclear.

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

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

In this thesis, we study different curved single crystals because of the diversity of surface structures across their curvature.

Large areas of space are filled by molecular clouds that consist of gas and dust grains that are the remnants of dead stars. When these clouds start collapsing, the decreasing temperature and increasing density cause gas particles to start accreting onto dust grain surfaces.

Promotor: Prof.dr. E.F. van Dishoeck, Prof.dr. F.F.S. van der Tak (RUG)

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.

In onze eerdere meta-analyse (Swart et al., 2019) toonden we aan dat door het geven van feedback gericht op tekstbegrip meer van teksten geleerd wordt. Tot dusver werden de verschillen in de effecten van feedback verklaard door verschillen in timing van feedback en de hoeveelheid informatie in de feedback.…

Promotor: Prof.dr. H.V.J. Linnartz

In dit project werken studenten van de Universiteit Leiden en de Universiteit van Valencia gezamenlijk aan een onderzoeksvraag op het gebied van de effectiviteit van feedback om leesbegrip te verbeteren. Studenten doen dit in het kader van hun masterscriptie, die zij elk individueel schrijven op basis…

Plants and soils from natural ecosystems harbor great diversity of soil microorganisms, which could potentially contribute to the sustainability of horticulture. The knowledge about using wild plant species and soil from natural ecosystem to improve the crop health will advance the application of ecological…

Kim de Jong, Jaime Delgadillo en Michael Barkham bieden waardevolle inzichten in hun boek 'Routine Outcome Monitoring and Feedback in Psychological Therapies' over hoe therapeuten en stagiaires feedback kunnen gebruiken om beslissingen over behandelingen te onderbouwen en uiteindelijk de resultaten…

It has been a long-standing mystery how complex biological structures emerge from such seemingly uncoordinated building blocks as cells and tissues, in the presence of only minimal environmental guidance.

The physical origin of the dozens of stellar-mass binaries, the mergers of which have been detected by the LIGO-Virgo-KAGRA collaboration via gravitational waves, is still unknown.

De overgang naar ouderschap is een belangrijke fase in de ontwikkeling van de levenscyclus die gepaard gaat met veel veranderingen zowel op persoonlijk als op gezinsniveau. De transitieperiode naar het ouderschap wordt daarmee gezien als een window of opportunity voor opvoedingsinterventies. Bestaande…

This thesis aimed to investigate core cross-linked polymeric micelles (CCPMs) and expand their potential for the delivery of hydrophobic drugs and co-factors.

In this thesis, I focused on studying the above- and belowground interactions of J. vulgaris from a plant-soil feedback (hereafter, PSF) perspective. I investigated the temporal variation of negative PSF and examined the effects of root-associated bacteria on plant performance and aboveground herbiv…

This thesis addresses the chemical processes that determine the compositions of giant planet atmospheres.

Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: M.R. Hogerheijde

Hoewel spreekvaardigheidonderwijs internationaal wordt beschouwd als essentieel voor het bevorderen van communicatieve vaardigheden en kritisch denken, is dit domein aanzienlijk minder onderzocht dan lees- en schrijfvaardigheid. Dit onderzoeksproject had als overkoepelend doel zicht te krijgen op werkende…