This PhD-thesis presents a study on micron-sized particles, so-called colloids. By controlling the chemical and physical properties of these particles, such as the interparticle interaction and the particles’ shape, colloids can act as building blocks that self-assembly into larger structures.

Promotor: Bas Edixhoven, Promotor: Qing Liu

Promotores: J. Kok, M. Chaudron (Chalmers University)

Op 13 oktober 2021 verdedigde Ross Spence het proefschrift 'Collateral Transactions and Shadow Banking'. Het promotieonderzoek is begeleid door promotoren prof.mr. M. Haentjens en prof.dr. A.M. Pacces (UvA).

Op 23 februari 2022 verdedigde Cale Davis het proefschrift 'Prosecutorial Discretion in International Criminal Justice'. Het promotieonderzoek is begeleid door prof.dr. C. Stahn en dr. J.C. Powderly.

With the advent of multicore processors and data centers, computer hardware has become increasingly parallel, allowing one to run multiple pieces of software at the same time on different machines. Coordination of these pieces is best expressed in a coordination language as an explicit interaction protocol…

Promotor: Prof.dr. B.R. Katzy

Time-series forecasting through modelling sequences of temporally dependent observations has many industrial and scientific applications. While machine learning models have been widely used to create time-series forecasting models, creating efficient and performant time-series forecasting models is…

In this thesis, we extend the concept of null models as canonical ensembles of multi-graphs with given constraints and present new metrics able to characterize real-world layered systems based on their correlation patterns.

In today's volatile market environments, companies must be able to continuously innovate. In this context, innovation does not only refer to the development of new products or business models but often also affects the entire organization, which has to transform its structures, processes, and ways of…

Catalysis is of extreme relevance in the production of everyday materials and plays a central role in many aspects of our life.

Inverse problems are problems where we want to estimate the values of certain parameters of a system given observations of the system. Such problems occur in several areas of science and engineering. Inverse problems are often ill-posed, which means that the observations of the system do not uniquely…

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

Promotores: T.H. Oosterkamp, N. de Jonge

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.

The overarching goal of this thesis is to set the foundations, but also make the first essential steps towards establishing a comprehensive, mesoscopic, hydrodynamic theory of epithelial tissues. The stage is set by an exhaustive study of topological defects in passive p-atic liquid crystals, singularities…

Mining time series is a machine learning subfield that focuses on a particular data structure, where variables are measured over (short or long) periods of time.

Classical statistical methods, such as p-values, are difficult for researchers to apply correctly. They for example do not allow drawing conclusions from a study early, or for extending a study with extra research groups that want to make their data available later.

Promotor: A.H. Meijer, Co-promotor: B.E. Snaar-Jagalska

Promotors: Prof.dr. P.J. Punt, Prof.dr. C.A.M.J.J. van den Hondel

If X is a locally compact Hausdorff space, then a representation of the complex C* algebra C_0(X) on a Hilbert space $H$ is given by a spectral measure that takes its values in the orthogonal projections on $H$.

Real-life processes are characterized by dynamics involving time. Examples are walking, sleeping, disease progress in medical treatment, and events in a workflow.

Promotores: A.H. Meijer, H.P. Spaink

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.

Materials balances have been used in the recent past for the analysis of substance oriented environmental problems and the formulation of measures for environmental policy. In this study an integrated tool, based on the materials balance principle, has been developed for the analysis of both environmental…

Which traits and/or trade-offs determine benefits of being deciduous or evergreen?

Machine Learning is becoming a more and more substantial technology for industry.

Promotor: Prof.dr. R.M.H. Merks

Despite being the object of intense study, embryonic development has been difficult to model due to a number of reasons. First, complex tissues can be comprised of many cell types, of which we probably only know a subset.

Promotores: Prof.dr. J. A. Bouwstra, Prof.dr. W. Jiskoot

Promotor: Prof.dr.ir. E. Deprettere

There are many interpretations of quantum mechanics, and ultimately experiments are needed to verify or falsify these interpretations.

In het academisch jaar 2023-2024 biedt het interdisciplinaire onderzoeksprogramma Sociale Veerkracht en Veiligheid vier vakken aan voor studenten die beginnen met het derde jaar van hun bachelor. Deze vakken zijn te volgen binnen de ruimte voor keuzevakken. Je kunt de vakken afzonderlijk als keuzevak…

Promotor: Prof.dr. D. Bouwmeester

In analogy to mathematical proofs, the goal of a proof system is for a prover to convince a verifier of the correctness of a claim.

Science is typically a patchwork of research contributions without much coordination. Especially in clinical trials, the follow-up studies that we do fail to be the most promising.

Promotor: Ronald Cramer, Co-promotor: Serge Fehr

Promotoren: Prof.dr. G.R. de Snoo en Dr. R. Heijungs

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

Promotor: C.A.J. Knibbe, Co-promotor: J.J. Boelens, R.G.M. Bredius

Op 8 juli 2020 verdedigde Andres Sarmiento Lamus zijn proefschrift 'The Proliferation of Dissenting Opinions in International Law'. Het promotieonderzoek is begeleid door promotoren prof.dr. L.J. van den Herik en prof.dr. Y.A.A.S. Radi (UCLouvain).

At the moment, over 350.000 chemicals are registered worldwide for production and use. Their application, however, may harm human health and the environment.

Can we provide the Dutch government with an integrative framework, wherein the various policies can be placed and the need for further measures can be identified?

Leiden is een echte studentenstad. Meld je aan voor een studievereniging of studentenvereniging om van jouw studietijd een onvergetelijke tijd te maken!

De YAL laat zich horen over beleidskwesties.

In Stockholm wordt op 19 en 20 mei een groot internationaal arbeidsrechtcongres georganiseerd. Het thema is ‘ New Foundations of Labour Law in the Globalised Market Economy’ .

De afdeling Arbeidsrecht van de Universiteit Leiden is een nieuwe samenwerking gestart met de China University of Labour Relations in Beijing. De overeenkomst werd ondertekend door de decaan prof. Jiang Ying tijdens het bezoek van haar delegatie op 19 september 2019 aan Leiden. Ook vice-decaan prof.…

Als je de bachelor Taalwetenschap hebt afgerond, heb je een waardevol pakket aan kennis en vaardigheden tot je beschikking.

De universiteit streeft ernaar dat alle studenten in hun opleiding kennismaken met duurzaamheidsthema’s en -vraagstukken, die zoveel mogelijk aansluiten bij de inhoud van hun opleiding.