Promotor: Huub de Groot, Co-promotor: Francesco Buda

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.

Promotor: Huub J.M. de Groot, Co-promotor: Francesco Buda

Supervisor: S.F. Portegies Zwart Co-Supervisor: A.G.A. Brown

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).

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

All the planets in our solar system orbit around the Sun in an ecliptical plane. This is to be expected because our solar system was formed from a so-called protoplanetary disc. PhD candidate Anna Miotello has studied these kinds of discs and how they influence the formation of stars and planets. PhD…

After nearly 70 years, the Leiden Observatory has a new telescope. A crowdfunding action in March brought in the 20,000 euros required to build a solar telescope. On 19 September Rector Magnificus Carel Stolker officiated at the opening.

Promotor: Prof.dr. H.W. Lenstra

A more efficient solar panel sounds great. But what if these new panels consume more toxic materials, or their production consumes a lot of energy? Leiden environmental scientists, together with colleagues from the Fraunhofer ISE, address this multifaceted question in a new publication in the prestigious…

The Honours Class From Solar to Fuel with Bio consisted almost entirely of the workshop on Solar Biofuels from Micro-organisms that drew more than eighty specialist researchers to Leiden's Lorentz Centre in late March/early April. Students Erica Wenker (chemistry) and Jasper van Dobben de Bruijn (law)…

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.

Promotor: H.W. Lenstra

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

Fieldwork is a crucial part of the learning process for students in the Faculty of Archaeology. This includes both fieldwork aimed at collecting archaeological data and materials as well as fieldwork for heritage studies. The Faculty has established a specific centre of expertise to further shape these…

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

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

This project investigates the role of art in the public and academic debate on biosolar energy

The field and the classroom invites ethnographers to engage with critical and engaged pedagogies. Breaking down the barriers between fieldsite and lecture hall, this research cluster aims to interrogate the structures and values that shape anthropological and sociological education today.

Promotor: Prof.dr. A. Achucarro, Co-Promotor: J.W. van Holten

One of the largest roofs at Leiden University, that of the Snellius building, has recently been equipped with 590 solar panels and 57,000 sedum plants, making it the largest combined roof in the Benelux. The roof was officially opened on Monday 10 October by Annetje Ottow and Martijn Ridderbos, President…

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

The energy system is at the heart of two of the greatest challenges of the 21st century: decreasing CO2 emissions to meet the ambitions of the Paris agreement while fulfilling the growing energy demand associated with the economic aspirations of a growing world population.

With increasing carbon dioxide levels in the atmosphere and their detrimental effect on the global climate, modern society needs to push for more renewable energy sources. Storing widely accessible and abundant solar energy in chemical bonds in the form of molecular fuel via artificial photosynthesis…

Scattering of light in the presence of nano-structured materials, i.e. with features in the order of the wavelength of the light or smaller, reveals details of how light interacts with matter at the nanoscale.

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.

Our cantilevers have a low intrinsic damping rate: this enables us to measure with low noise, since damping is proportionate to noise. However, when the magnet is close to the surface of a sample we want to study, we measure a much higher effective damping rate. This is caused by magnetic interaction…

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

Promotor: Prof.dr.ir. T.H. Oosterkamp, N. de Jonge

Since the adoption of agriculture people have cultivated fields. The project concerns all kinds of aspects related to raising crops.

Promotor: E. Bouwman, Co-promotor: S. Bonnet

In this thesis, we develop a novel technique called Optical Near-field Electron Microscopy (ONEM), which aims to combine the advantages of both optical and electron microscopy: the high resolution of electron microscopy and the low sample damage of optical microscopy.

In July 2004, a cooperation started between the Faculty of Archaeology and the Museo del Hombre Dominicano and the (University College London, England, Dr. José Oliver), to explore the possibilities to jointly undertake archaeological investigations in the Dominican Republic.

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

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

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

Two things are needed to produce fuel from sunlight: an antenna that harvests light, and a light-driven catalyst. The most efficient antennae contain bacteria. An international team headed by Huub de Groot imitated them and discovered how they function.

Promotor: S.J. Edixhoven

Make more fluid: In condensed matter systems, electrons can acquire unusual properties from their interaction with the atomic lattice.

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.

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

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…