Decarbonizing the building stock is critical for realizing the climate-neutral target for the Netherlands.

De huidige en toekomstige quantumcomputers vormen dezelfde uitdaging als de laser in zijn begindagen. In theorie werd voorspeld dat de laser een bron van zeer speciaal, zeer krachtig licht zou zijn. Maar in die tijd waren er geen duidelijke toepassingen voor. Critici van het idee noemden het een probleem…

Plants and their pollinators form complex interaction networks. Within these networks, species differ widely in the number of species they interact with.

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

In this thesis, we consider various (electro)chemical phenomena at surfaces and nanoparticles and their underlying atomistic processes, which we studied using first-principles methods such as density functional theory.

Het centrum van ons Melkwegstelsel is zo donker en opeengepakt dat het bijna onmogelijk is om te zien wat erin zit. Door de zeldzame hogesnelheidssterren te vangen die uit het centrum schieten, wil astronoom Elena Rossi de mysterieuze omgeving rond het superzware zwarte gat binnenin onthullen. Maar…

This thesis addresses the importance of a resilient supply of critical raw materials (CRM) for the global energy transition.

The focus of the dissertation

Metal production is not only energy-intensive and a major source of greenhouse gas (GHG) emissions, but is also associated with other impacts affecting human health and ecosystems.

Supply risks are not new. But the aggravation of power conflicts on the international stage coupled with global shifts towards energy transition and digitalization has triggered the next supply risk research era.

This thesis comprises the development of reproducible synthesis procedures for two-dimensional materials (composed of boron, nitrogen and carbon) on different metallic surfaces.

The glycosylation reaction is a pivotal reaction in creating new and complex oligosaccharides.

Prof. Carlos Frenk sprak voor de Oortlezing 2015 over niets. Op een toegankelijke manier kreeg het publiek een stoomcursus Kosmologie, waarin de focus lag op donkere materie, donkere energie en de evolutie van het heelal. Het publiek van de jaarlijkse lezing bestond staf van de Sterrewacht, maar ook…

This thesis contributes to studying primordial cosmology theories and their detectability in future observations.

The first direct detection of gravitational waves opened the possibility of mapping the Universe via this new and independent messenger.

Waarom wormen astma bestrijden en sommige eenden necrofiel en homoseksueel zijn. In de Leidse Nacht van Kunst en Kennis op 20 september vindt ook de Nederlandse Ig Nobel Night plaats, een ode aan origineel onderzoek.

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”.

Promotor: Jelle S. Kaastra Co-promotor: Jelle de Plaa

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…

In-use stocks of products can be considered as intermediaries between human needs and the physical world.

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.

Een internationaal team van astrofysici en computerwetenschappers, onder leiding van prof. dr. Simon Portegies Zwart, is er voor het eerst in geslaagd een grootschalige berekening uit te voeren op twee gekoppelde supercomputers. Het onderzoeksteam gaat met de berekening, genaamd CosmoGrid, de vorming…

Prof.dr. Koen Kuijken heeft de Humboldt Research Award ontvangen voor zijn onderzoek naar donkere materie in melkwegstelsels. De prijs bestaat uit een geldbedrag van € 60.000,- en de mogelijkheid om een jaar lang onderzoek uit te voeren in samenwerking met gespecialiseerde collega's in Duitsland.

As a virtually inexhaustible source, solar energy plays a major role in future global energy scenarios.

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

De Leidse astronoom Margot Brouwer heeft als eerste de nieuwe theorie van de Amsterdamse theoretisch natuurkundige Erik Verlinde getest door middel van de lenswerking van zwaartekracht. De uitkomsten komen goed overeen met de theorie.

Humanity stands at a pivotal juncture, facing the dual challenge of environmental sustainability and rapid population growth, projected to exceed 11 billion by century’s end.

The research presented in this thesis makes use of small molecules (as H2 , D2 and O2 ) on well-defined single crystal surfaces (flat Pt(111), flat Cu(211) and curved Pt(111)) to elucidate the role of surface structure and degrees of freedom in the reactant in specific surface reactions.

On a structural level, the properties featured by a majority of mechanical metamaterials can be ascribed to the finite number of soft internal degrees-of freedom allowing for low-energy deformations.

Before the large scale use of renewable energy sources can be implemented in our society, the storage of electrical energy needs to be tackled. Storage the energy as hydrogen via the reduction of protons is a good option.

Publicaties van het Leids Papyrologisch Instituut

feestbundel voor de Britse demotisant Cary J. Martin (UC Londen)

Promotor: M.T.M. Koper, Co-promotor: L. Juurlink

Promotor: P.J.J. Hooykaas, Co-Promotor: E.J. van der Zaal

In the current global context, there is a pressing need to address sustainable energy supplies to safeguard our Planet and its ecosystems. The choices made by human society have a significant impact on genetic evolution and climate.

Human civilization consumes a huge amount of fossil fuels, which has resulted in an atmospheric CO2 level which has not been higher in over 800 millennia.

Reducing greenhouse gas emissions is one of the most pressing challenges that humanity faces in the coming decades.

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

The transition to electric vehicles (EVs) reduces vehicle emissions to combat climate change. EVs raise concerns regarding the production of lithium-ion batteries and related emissions; while batteries can also provide energy storage services for the electricity system.

This thesis studied in depth the energy use and CO2 emissions of the industrial sector in China.

This thesis addresses the problem of designing performance and energy efficient embedded streaming systems, that is, systems which process a stream of input data coming from the environment and generate a stream of output data going into the environment.

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…

The growing demand of energy indicates that global energy resources in the form of fossil fuels will not be sufficient in the future. In order to solve potential future energy problems development of a sustainable hydrogen economy is highly desirable.

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

This thesis is a (biased) journey through very different topics in astrophysics: quasars and new populations of active galactic nuclei, gravitational waves from merging black holes, and protoplanetary discs around young stars.

Heterogeneous catalyzed processes are highly significant to the chemical industry. Dissociative chemisorption (DC) of molecules on surfaces is always considered as a step with a high degree of rate control for heterogeneous catalysis.

This thesis examines the impacts and challenges of water use of electric power system. This thesis found that there are large differences in water use of electricity technologies, with hydropower and thermal power being two large water users.

Promotor: W.Th.F. den Hollander, Co-promotor: F.R. Nardi

Promotors: Prof.dr. J. Zaanen, Prof.dr.ir. H. Hilgenkamp