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.

Om windturbines en elektrische auto’s te bouwen, hebben we tonnen magneten nodig. Momenteel importeren we die voornamelijk uit China, waardoor Europa voor de energietransitie erg afhankelijk is van deze grootmacht. Daar moet verandering in komen, aldus Industrieel ecoloog René Kleijn. In het project…

When you have decided to participate in a Summer School of Leiden University, there are some matters you need to know before arrival. Please take a few minutes to read through the information here to find out what you can do from your side to smooth the process.

This study has been carried out in the community of Sukamiskin, a kelurahan (‘village’) in Bandung, the Capital of West Java Province, located in the Sunda Region of Indonesia.

This dissertation focused on computational methods based on first principles calculations using the Density Functional Theory (DFT) framework. Emphasis was laid on affordable methods that can provide a tradeoff between computational expense and accuracy.

Binnen het brede netwerk van de Universiteit Leiden neemt het instituut deel aan onderzoek binnen de volgende profileringsgebieden:

Kijk mee en praat mee over de wetenschap van het verleden tijdens wekelijkse Let’s Plays van populaire games en vodcasts op het livestreamplatform Twitch.

Leiden University’s Academic Challenge

This thesis covers various applications of topology in condensed matter physics and quantum information.

Promotor: M.A.G.J. Orrit

Lezing

Promotie

Archeoloog Victor Klinkenberg onderzocht een oude Assyrische nederzetting in Syrië, dichtbij IS-bolwerk Raqqa. ‘Al met al speelde het sociale leven een veel grotere rol dan het militaire.’ Promotie op 27 oktober.

The expanding population and economic activity are driving up global energy consumption. Simultaneously, there is an urgent need to transition from fossil fuels to renewable sources to mitigate the climate crisis, primarily caused by fossil fuel combustion.

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

Promotor: G.J. Kramer Co-Promotor: E.G.M. Kleijn

The demand for neodymium-iron-boron (NdFeB) magnets is rapidly growing, while the neodymium supply chain is under pressure. Recycling can alleviate these issues. This thesis investigates the potential for deploying novel magnet recycling technologies and their environmental consequences.

To meet the rising demand for minerals driven by the global shift to clean energy technologies, ensuring responsible and resilient supply chains is critical. Minerals like cobalt, lithium, and nickel for batteries, neodymium and zinc for wind turbines, and indium for solar panels are essential.

The global transition toward low-carbon energy systems and the rapid expansion of digital technologies, including artificial intelligence, are reshaping how modern societies produce, move, and process energy and information.

Bekijk, beluister, proef en kook zelf in de Smaakstudio opgezet door, onder anderen, archeologe dr. Joanita Vroom, in het kader van een nieuwe tentoonstelling in het Wereldmuseum, Rotterdam. Joanita Vroom geeft ook een serie workshops over voedsel uit het verleden.

Religion, Philosophy, and the Pre-modern World

De onderzoekers van het departement ‘World Archaeology’ van de Faculteit Archeologie richten zich in hun onderzoek op verschillende periodes en regio’s: van de oorsprong van de mens tot aan de Middeleeuwen en de moderne tijd, en van Azië tot Zuid-Amerika.

In this thesis, deep learning is studied from a statistical perspective. Convergence rates for the worst case risk bounds of neural network estimators are obtained in the classification, density estimation and linear regression model.

The work presented in this thesis is based on ALMA surveys of protoplanetary disks in three star-forming regions: Lupus, OMC-2, and NGC 2024.

A large diversity of exoplanetary systems has been found, but it is still unclear what drives this diversity.

Promotor: Prof.dr. P. Stevenhagen, Co-promotor: B. de Smit

This thesis revolves around the electronic spectroscopy of molecules in the laboratory and the search for the carriers of the diffuse interstellar bands (DIBs).

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

A modern ship design process is subject to a wide variety of constraints such as safety constraints, regulations, and physical constraints.

This thesis aims to improve the detection from ultra-weak single emitter by enhancing their emission properties with plasmonic nanostructures. We exploit the wet-chemically synthesized single crystalline gold nanorods (GNRs) as our basic frameworks in the whole studies, simply because of their unique…

Promotor: Prof.dr. D. Bouwmeester

This thesis investigates reactive interfaces in surface science across three domains: heterogeneous catalysis, environmental nanoplastics, and two-dimensional materials.

Promotores: S.F. Portegies Zwart, E. M. Rossi

Promotor: I. A. G. Snellen, Co-promotor: M. A. Kenworthy

Bacterial chemosensory arrays are protein assemblies that are the key structural and functional component for motile bacteria to sense their internal or environmental chemical signals.

This thesis systematically analyzes the physical-chemistry of lipid-graphene interactions with the major objective of reconciliating the variety of results reported in the literature.

Promotor: Prof.dr. J. Kuiper

We have studied the impact of particle shape anisotropy, multivalent interactions and flexibility on systems of micron-sized colloidal particles.

On the largest scale, the Universe resembles a cosmic spiderweb. Most galaxies coexist in small groups within the threads of this web. At the nodes of the threads are enormous groups of galaxies forming the largest structures in the universe still held together by gravity: clusters of galaxies.

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

Sustainable energy from wind and solar is most readily available near the sea.

Onderzoek vindt plaats binnen drie onderzoekscholen: Azië, Midden-Oosten en Religiestudies. Hierbinnen richten we ons op specifieke regio’s en onderwerpen zoals talen en culturen, erfgoed, en de menselijke digitale wereld.

Promotie

Promotie

Veel belangrijke onderwerpen in de informatica, zoals de juistheid van software, de efficiëntie van algoritmen en de modellering van gecompliceerde systemen, zijn afhankelijk van een goede theoretische onderbouwing. In de Theoriegroep bestuderen we deze fundamentele bouwstenen en ontwikkelen we verificatiemethoden…

In surface science there is great effort to move from studying simple, flat model surfaces in vacuum to investigating more complex model catalysts in gas environments (in situ). This thesis gives three examples of such studies using microscopy and spectroscopy.

Promotores: H.S. Overkleeft; G.A. van der Marel Co-Promotor: B.I. Florea