This thesis consists of three chapters. Each chapter is on a different subject. However, all three chapters address issues that arise in counting arithmetically interesting objects.

An algorithm is discussed to compute the exponential representation of principal units in a finite extension field F of the p-adic rationals.

Promotores: B. Erez, P. Stevenhagen, Co-Promotor: B. de Smit

Assessing the risks of engineered nanomaterials (ENMs) solely on the basis of experimental assays is time-consuming, resource intensive, and constrained by ethical considerations (such as the principles of the 3Rs of animal testing). The adoption of computational toxicology in this field is a high p…

Het doel van dit EU+ project is het bestuderen en maken van pedagogische didactische instrumenten voor het bevorderen van inclusieve onderwijspraktijken in het hoger onderwijs.

The formation and evolution of galaxies is fundamentally driven by the formation of new stars out of cold gas.

Natural history collections provide invaluable sources for researchers with different disciplinary backgrounds, aspiring to study the geographical distribution of flora and fauna across the globe as well as other evolutionary processes.

Hoe zijn docenten aan een universiteit betrokken bij het ontwikkelen van onderwijs, en welke vrijheden krijgen zij?

Onze voorlichtingsactiviteiten kunnen je helpen bij het maken van de juiste studiekeuze. Gedurende het hele jaar kun je op verschillende manieren kennismaken met de Universiteit Leiden, onze bacheloropleidingen en studeren in Leiden en Den Haag.

This thesis presents pioneering work on the panchromatic emission of some of the most luminous galaxies in the early Universe: star forming galaxies and active galactic nuclei.

De Gemeente Oss is een begrip in de wereld van de Nederlandse archeologie. Al vijftig jaar leggen Leidse archeologen, in samenwerking met inwoners van Oss, de geschiedenis van de gemeente bloot. In 2024 vieren we deze 50 jaar aan samenwerking. Houd deze website in de gaten voor onze activiteiten!

Prof.dr. P. Stevenhagen, Prof.dr. K. Belabas (Universite Bordeaux I)

Review of new technical decisionsupport systems in the environmental field, and application in water management decission processes.

In this thesis, we show how MRFM can usefully contribute to the field of condensed-matter.

Promotor: Carel J. ten Cate, Co-Promotor: Hans W. Slabbekoorn

Striga hermonthica, commonly known as witchweed, infests major cereal crops in Sub-Saharan Africa causing severe yield losses and threatening the livelihood of millions of resource poor farmers.

Galaxies form and live inside dark matter haloes. As a consequence, they are exposed to the tidal fields generated by the surrounding matter distribution: this imprints a preferential direction to the galaxy shapes, which leads to a coherent alignment on physically close galaxies, called intrinsic a…

Promotor: Prof.dr. E. F. van Dishoeck

The field of exoplanet research is rapidly advancing through the development of new technology, observing techniques, and post-processing methods.

In this thesis, we use low-frequency and high-frequency radio observations to address the following questions regarding quasars: is the radio loud/quiet quasar dichotomy real?

The research described in this thesis shows that hypercholesterolemia, a well-established risk factor for atherosclerosis, can impact skin lipid pool and barrier function already at young age. In the field of atherosclerosis, we showed that the small peptide Lyp-1 can be used as a targeting molecule…

Promotor: T.H. Oosterkamp

Promotor: J. Schaye

This thesis seeks to combine two different research topics; Multi-Objective Optimization and Complex Network Analysis.

Promotor: C. W. J. Beenakker, Yu. V. Nazarov, Co-promotor: J. Tworzydlo

Promotor: J. N. Kok, Co-promotor: A. J. Knobbe

Promotor: Prof.dr. J.N. Kok, Co-promotor: A.J. Knobbe

Promotor: Prof.dr. P.G.L. Klinkhamer, Co-Promotor: T.J. de Jong

Synthetic microswimmers take an important place within the interdisciplinary field of active soft matter.

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…

Promotores: Prof.dr.G.R. de Snoo and Dr. R. Heijungs

Promotor: T. H. Oosterkamp

Promotor: J. Zaanen, Co-Promotor: V. Juricic

This thesis describes the use of bioorthogonal proteins in immunological settings. It provides an introduction towards the field of protein modification, which was used throughout the thesis for the expression of proteins containing unnatural amino acids.

Surface plasmons (SPs) are surface waves at the interface between a dielectric and a good metal, and are formed by the interaction between light and the free electrons at the metal-dielectric interface. They provide strong field confinement for optical fields, opening new possibilities for enhanced…

Spectroscopic studies on fluorescent single molecules in organic condensed matter does not only provide information about the molecule itself, but also its near environment. By suppression of phonon-induced broadening of spectral lines through cooling to low temperatures, small changes in the spectral…

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.

De programmagroep 'Leer- en Gedragsproblemen in het Onderwijs' zoekt naar oplossingen voor uitdagingen waar kinderen en jongvolwassenen in het onderwijs tegenaan kunnen lopen.

Werken aan ICT bij een topuniversiteit? Met uitstekende carrièremogelijkheden? Ontdek het werken bij het ICT Shared Service Centre van de Universiteit Leiden.

A brief review essay on some of the work that has been recently published in the emergent field of digital ethnography.

Onder supervisie van Dr. Mike Field wordt in Botanisch Laboratorium onderzoek gedaan naar archaïsch en paleo-botanisch materiaal, waaronder zaden en vruchten, pollen en sporen, en hout.

This joint Master with the Autonomous University of Barcelona will the equip you with the necessary competences to play a key role in the emerging field of transfusion medicine. The programme includes both transfusion of blood components and hematopoietic transplants, cellular and tissue therapy, and…

De Universiteit Leiden is volgens studenten de op een na beste brede universiteit van Nederland, aldus onderzoek van weekblad Elsevier. De Radboud Universiteit Nijmegen staat in de ranglijst op de eerste plaats.

I will give a general introduction to the field of molecular electronics, its history, methods and challenges. I will also introduce the subject of my investigation and provide a brief outlook to the remainder of our thesis.

Risk has become one of the defining features of modern society. This course examines various types of safety and security risks, and how these are perceived and dealt with in a wide array of professional and academic fields, ranging from criminology, counter-terrorism and cyber security, to philosophy,…

This course explores international arbitration as one of the most common methods of international dispute settlement. You will gain an in-depth understanding of international arbitration through the analysis of its role as a mechanism of dispute settlement, its institutions, the fields of law it is…

Discover the executive master program Cuber Security and learn about sustainable solutions for cyber risks and threats! Read more

Promotores: Prof.dr. J. Zaanen, Prof.dr. K.E. Schalm

In the last decade, the redox interconversion between metal thiolate and disulfide compounds has been extensively investigated for copper, but not for other transition metal ions.