Promotor: K. Kuijken, Co-Promotor: H. Hoekstra

This thesis is dedicated to the exploration of the primordial dark ages: unknown physics during the earliest stages of the Universe’s expansion that have not yet been directly probed by observations. Cosmic inflation is a burst of exponential expansion of space after the “Big Bang”.

The theoretical explanation of cosmic acceleration is nowadays one of the biggest puzzles in cosmology.

At the largest scales, two ingredients dictate the distribution of matter in the Universe. The first is dark matter, acting as an invisible scaffolding held together by gravitational forces.

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.

Naar schatting bestaat de wereldbevolking over twintig jaar uit ongeveer 8,7 miljard mensen, terwijl dat aantal nu 7,3 miljard is. Deze groei, gecombineerd met de bijbehorende groei in consumptie en de verbeteringen in levensstandaarden, zal resulteren in een enorme groei in de vraag naar voedsel, verbruiksgoederen,…

It is an established fact that the Standard Model has to be extended to explain the so-called Beyond the Standard Model (BSM) phenomena: dark matter, matter-antimatter asymmetry of the Universe and neutrino flavour oscillations.

The Institute of Environmental Sciences has carried out and participates in several projects that deal with the analysis of energy systems.

This thesis is largely an experimental study on the formation of solid-state simple and complex organic molecules in the H2O-rich and CO-rich ice phases of dense interstellar clouds and dark cores.

Promotor: Prof.dr. H.J.M. de Groot, Co-promotor: Francesco Buda

Promotor: Prof.dr. J. Schaye, Co-promotor: Marcello Cacciato

Of all the mass in our Universe, 80% is thought to consist of a hypothetical and invisible substance called dark matter (DM).

Examining if large scale application of new energy pathways can be constrained by materials and emissions.

The focus of the dissertation

Het moet er zijn, alleen kunnen we het niet zien: de raadselachtige donkere materie en donkere energie in het heelal. Henk Hoekstra is een van de vele kosmologen die dolgraag, willen weten waar deze substanties precies uit bestaan. Hij kreeg er een Europese onderzoekssubsidie van 1,3 miljoen euro vo…

In dit project gebruiken we sociale netwerkanalyse om het gedrag van gebruikers op online fora en bijbehorende marktplaatsen in de tijd te analyseren.

Material circularity and energy efficiency are highly relevant and intertwined issues for the transition towards a carbon-neutral and circular built environment. In the Netherlands, the building sector has been rendered a priority towards a circular and low-carbon society.

Hetterscheid

Systems are called real-time systems, if the correctness of the system does not only depend on the correctness of the system output but also on whether the output is delivered on time.

PhD Defence

In this thesis, classes of strongly interacting quantum field theories, have been studied.

Promotor: Prof.dr. J.M. van Ruitenbeek, Prof.dr. R.M. Tromp

Donkere materie. Onzichtbaar spul wat volgens berekeningen zo’n 85% van de materie in het heelal omvat. Met een ERC Advanced Grant van 2.5 miljoen euro gaat Hoogleraar Observationele Kosmologie Henk Hoekstra nog preciezer in kaart brengen waar deze donkere materie zich bevindt.

The development of new environmentally sound technologies is seen as a key route towards achieving sustainability.

Juurlink

Een elastische doek over een kom die de ruimte voorstelt, een knikker die op het oppervlak een kuiltje veroorzaakt en zo de ruimte vervormt. Eenvoudige klasexperimenten zoals deze zijn te zien in nieuwe educatieve video's van AstroEDU. In de video's leggen de Leidse astronomen Maria Cristina Fortuna…

De Energie survival gids van prof. Jo Hermans is nu ook in het Engels beschikbaar en bovendien is het boek volledig geüpdated. De Energy Survival Guide is een compacte en betrouwbare bron van informatie voor iedereen die op zoek is naar adviezen over de toekomst van de wereldwijde energievoorziening…

The STW project Energy Efficient Computer-Brain Interaction (principal investigator for LIACS: dr. T.P. Stefanov) has been granted. Funding for LIACS: 1 PhD student + travel/equipment budget, project duration: 4 years.

HEPGAME is a research project that combines the world’s fastest computer algebra system for High Energy Physics equations, FORM, with insights from artificial intelligence. The name combines High Energy Physics and Games.

Promotor: Koen Kuijken Co-promotor: Henk Hoekstra

This thesis discusses the discovery potential of Intensity Frontier experiments.

Op Dinsdag 10 Maart 2015 - 10h zal Ernst Worrell, professor aan de Universteit Utrecht met een leerstoel op

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

In astronomy, the interpration of observations and measurements plays a crucial role: we rely purely and fundamentally on the information that reaches us as observers. And 80% of all matter in the universe is undetectable directly.

Conference

Lecture, Studium Generale

Development of GHG calculator for bio-electricity and heat.

Exploring linkages between energy and material use and implications for sustainable development.

With the energy transition toward a renewable energy supply and a CO2-neutral economy, electrification of the energy system is rising in importance, which leads to the challenge of long-term storage of renewable electricity.