Stellar feedback is a crucial ingredient in the evolution of galaxies.

Promotores: C. J. ten Cate; M. A. Ainslie. Co-promotor: W. Slabbekoorn

Organisms often need to adapt more efficiently and devise new strategies for surviving difficult ecological circumstances.

This thesis is devoted to an in-depth examination of the various effects of disorder in the cuprate high-temperature superconductors.

Together@FGGA – Together towards a safe, inclusive and balanced work environment

The research in this thesis is focused on tomographic reconstruction based on two imaging modalities in electron microscopy.

This thesis provides an overview of the development of the Pair Configuration to Molecular Activity Coefficient (PAC-MAC) model.

In the first part of this thesis we study the geometry of folding patterns.

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

In multi/many-core System-on-Chips (SoCs), the performance is almost linearly scaling with the number of processing elements.

Heterogeneous catalysis is one of the fundamental processes of modern life, being common in industrial refinery and hydrogen vehicles, all the way to the living cell. The dissociation of H2 on Cu(111) is an important benchmark system for studying heterogeneous catalysis, with a large and varied amount…

An Active Galactic Nucleus (AGN) is a highly luminous region at the center of a galaxy, powered by the accretion into a supermassive black hole and emitting energy from radio waves to gamma rays, often outshining the host galaxy.

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

With the help of quantum mechanics, digital quantum hardware may be able to tackle some of the problems that are too difficult for ordinary computers. But despite these expectations and the ongoing effort of the research community, reliable quantum computers are not yet realized in a lab setting.

The new building for the Faculty of Mathematics and Natural Sciences is a significant milestone for Leiden University and the faculty in particular. A new building is being realized in three phases. The first phase of the new building was put into use in 2016 and covers an area of 45,000m2. The second…

Bacterial biocatalysis constitutes a sustainable alternative for high-value chemicals production by enabling the utilization of renewable feedstocks.

The dissociative chemisorption of methane on metal surfaces is of fundamental and practical interest, being a rate-limiting step in the steam reforming process. The reaction is best modeled with quantum dynamics calculations, but these are currently not guaranteed to produce accurate results because…

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.

Promotor: M.L. van Hecke, Co-Promotor: B.P. Tighe

A plasma is an ionized gas with very low electrical resistivity. As such, magnetic field lines are 'frozen in' and move with the fluid. Magnetic field lines that are linked, knotted and tangled, cannot be undone by the fluid motions.

The parabolic Anderson model (PAM), which is the Cauchy problem for the heat equation with random potential. The PAM is a mathematical model that describes how mass (i.e. matter or energy) flows in a medium in the presence of a field of sources and sinks.

In this thesis, topics relating to the optimization of high-throughput pipelines used for imaging are discussed. In particular, different levels of implementation, i.e., conceptual, software, and hardware, are discussed and the thesis outlines how advances on each level need to be made to make gains…

While there is a general consensus on the need for climate action among elites and the public, the public overall willingness to pay for such efforts is much lower.

Carbohydrates, alongside proteins and nucleic acids, constitute a crucial and versatile family of biomolecules present in all life forms. They manifest as monosaccharides, oligosaccharides, and polysaccharides, covalently bonded to proteins and fats. Carbohydrates are integral to plant and arthropod…

Voltammetry plays a crucial role in modern scientific research by offering valuable insights into the electrochemical properties of materials, with wide-ranging applications in fields such as materials science, energy storage, corrosion studies, and sensor development.

What physics controls the properties of quantum matter, such as how electrons flow inside high-temperature superconductors? This question has captivated the physics community and industry for decades, in part due to the great technological potential such materials have, but also because they have resisted…

In the MSc Chemistry programme you will focus your studies on one of LIC's two main research areas, Chemical Biology or Energy & Sustainability, and one specialisation.

Hydrogen fuel cells are expected to be pivotal in the energetic transition towards renewable energy sources such as solar and wind power. However, their industrial scalability is severely hindered by the high cost and degradation rate of platinum catalysts, one of their key components. Addressing this…

e-Sides is a Horizon 2020 project which aims at mapping ethical, legal, societal and economic challenges of the big data technologies. eLaw- Center for Law and Digital Technologies- is one of the members of the e-SIDES research consortium and its role within the project is to develop the systematic…

With cancer, a person’s body cells grow uncontrollably. Putting together a detailed picture of how this comes about makes it possible to develop efficient therapies. Researchers at the Leiden University Medical Centre (LUMC) and Leiden University are working together to gain a better understanding…

The worldwide race to the quantum computer is in full swing. This computer can take on computing tasks that we can only dream of today, such as finding proteins that can be used as medicines in seconds flat. Leiden physicists have discovered how the Majorana particle can be used as a building block…

Astronomers want to understand the Universe, from the Big Bang to the present day, and what the future will hold. In Leiden they focus on two key questions: ‘How did stars and planets originate’ and ‘How were galaxies and black holes formed in the young Universe?’ A new generation of telescopes – just…

How can we organise society so as to keep our planet habitable for us and for all other life forms around us? To answer this question, Leiden researchers collaborate across disciplines, from biology to data science, and from environmental economy to archaeology.

PhD defence

Should Leiden University cut its ties with the fossil fuel industry forthwith? This was the main question in a debate between students and staff. The answer was clearer for some than for others.

We explored the Universe using weak gravitational lensing, a phenomenon that occurs when light from distant galaxies is bent by the gravitational fields of closer cosmic objects, much like how a lens distorts light.

From treatment plants to hot showers, emissions from water use in the U.S. are equal to 50 million cars driving around for a year. In The Washington Post, staff writer Tik Root consults different experts to learn about ways to reduce our water consumption. He also speaks with Leiden environmental scientist…

On 29 January 2019, Robbert J. van Eijk will defend his Ph.D thesis, in which he investigates the online advertisements that seem to follow you.

In just over a decade, Uber has revolutionised how we move around our cities. The ride-hailing app was a game-changer: you just tapped your phone and a cab would find you. You even paid through the app. However, some of the Uber’s more controversial practices have triggered the interest of law enforcement,…

Ultimate beneficial owners (UBOs) of companies should have registered their information in the Dutch UBO register before 27 March 2022. The Dutch Minister of Finance saw no reason to postpone the deadline for registration, according to answers to parliamentary questions. In an article on the legal platform…

The challenge of achieving fast quantification in metabolomics is the presence of severe matrix effects during the MS analysis of complex samples.

Computers are increasingly able to accomplish tasks that are difficult for human experts, such as diagnosing diseases or detecting credit card fraud. While the earliest examples of computational thinking can be traced back to the 13th century, according to Holger Hoos, Leiden Professor of Machine Learning,…

Astronomer Koen Kuijken and physicist Tjerk Oosterkamp have each been awarded a major subsidy by NWO. The funding will allow them to construct new research facilities.

On 15 November in Brussels, the Brussels Privacy Hub and the Future of Privacy Forum held the 6th edition of the 'Brussels Privacy Symposium'. The topic of this year was 'Vulnerable People, Marginalisation and Data Protection'.

On May 16th 2018, the Law Faculty of Basel University organised a workshop on Law & Robots, titled Predictive Analytics bei Versicherungen und in der Arbeitswelt: Diskriminierung durch Algorithmen? (Predictive Analytics in Insurance and Labor: Discrimination by Algorithms?). At this event, dr. Bart…

Rong Yuang, PhD candidate from the Institute of Environmental Sciences investigated the impact of the renewable energy expansion on China’s carbon emission. On 17 May, she will defend her thesis. China is investing heavily in the development of low-carbon electricity sources, like nuclear, hydro-,…

Leiden Physicists have developed a new technique to visualize electrical conductance in sheet-like nano materials. It shows great promise for devices based on a new family of materials—the ‘Van der Waals materials’. The physicists, who won the 2015 Dutch Vacuum Society prize for their work, present…

Lecture