Patients share valuable advice and experiences with their peers in online patient discussion groups.

Promotor: Prof.dr. J.N. Kok

In this thesis three different topics in number theory are studied.

Promotor: Prof.dr. J.N. Kok, Co-promotor: F.J. Verbeek

Metabolomics has the potential to play a pivotal role in understanding disease onset and progression, and ultimately personalized treatments. One of its major challenges is its large-scale implementation, which is necessary to deal with the high variability of the metabolome. In this work we have developed…

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

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

Promotor: K.E. Schalm, Co-promotor: S.S. Lee

Promotores: T.H.W. Bäck, A. Plaat, Co-promotor: F.J. Verbeek

Promotor: R.D. Gill, F. Taroni

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.

Promotores: K.J. Batenburg, B. Koren

Systems are called real-time systems, if the correctness of the system does not only depend on the correctness of the system output but also on whether the output is delivered on time.

Dr. Joris Larik analyseert het zwaarbevochten akkoord tussen de EU en het VK in het Nederlands Juristenblad.

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.

Promotor: Prof.dr. P. Stevenhagen, Prof.dr. K. Belabas (Univ. de Bordeaux)

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.

In times of hardships or crisis, local people know how to deal with it using their resourcefulness. Although efforts are sometimes made by the government to help them, they are fully aware that community support is at least equally important.

This dissertation focuses on developing new mathematical and statistical methods to properly represent time-varying covariates and model them within the context of time-to-event analysis.

The focus throughout this thesis will be on gathering fundamental studies of the detailed structure and composition of the electrode/electrolyte interface effect on the rate and mechanism of key electrocatalytic reactions.

Building a Deep Cross-media Transfer Network to extract visual relations that relieve the problem of insufficient training data for visual tasks.

Promotor: H.W. Lenstra

The different kinds of cultural perspectives on health and disease of the participants are related to their knowledge, beliefs, values and practices manifested in various forms of lifestyle in Indonesia. The cultural diversity of the population is also related to differences in health behaviour.

In dit vierde rapport worden ontwikkelingen besproken ten aanzien van het beleid met betrekking tot personen die terugkeren uit jihadistische strijdgebieden, zogeheten ‘terugkeerders’, voor de periode januari 2017 tot medio december 2018.

Promotores: Prof.dr. G.W. Canters, Prof.dr. T.J. Aartsma

Promotores: P. Stevenhagen, A. Enge Co-Promotor: T.C. Streng

During post-embryonic development into adults, animals face an environment that fluctuates constantly. For example, in nutrient availability, temperature, and osmolarity (e.g., salt concentration).

Het doel van het RAISE Onderzoek is om te onderzoeken hoe veerkrachtige mensen omgaan met stress. We kijken specifiek naar hoe belangrijke biologische systemen, zoals de HPA-as en het immuunsysteem, samenwerken met de hersenen en de sociale omgeving om veerkrachtig functioneren na moeilijkheden in de…

Wetland plants are distinguished from plants of other terrestrial ecosystems by their adaptations to specific habitat stresses, including waterlogged and flooding and the subsequent abundance of phytotoxic compounds.

Promotor: Prof.dr. E Gittenberger, Co-Promotores: C.H.J.M. Fransen, B.W. Hoeksema

The department of Industrial Ecology is dealing with research into the development of tools for decision making on sustainable production and consumption.

One of the key limitations of the direct imaging of exoplanets at small angular separations are quasi-static speckles that originate from evolving non-common path aberrations (NCPA) to which the primary adaptive optics system is inherently blind. The main focus of this thesis is the development and…

Understanding interactions in quantum many-body systems remains one of the most profound and difficult challenges in condensed matter physics.

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: S.M. Verduyn Lunel, Co-promotor: S.C. Hille

Promotor: Prof.dr. W.T.F. den Hollander

Promotor: Prof.dr. E.F. Smets. Co-promotores: B. Gravendeel, F. Pupulin

Promotor: Prof.dr. F.S. de Boer, Co-promotor: D. Clarke

Welkom op de website van Leven in het Heelal, een lesprogramma van de Leidse Sterrewacht voor basisschoolleerlingen. Hier op aarde hebben we de juiste omstandigheden voor leven om op te bloeien, en bijna overal zijn wel planten en dieren te vinden. Maar hoe is dat op andere plekken in ons zonnestelsel?…

Kijk regelmatig op deze pagina voor meer informatie over het inpassen van duurzaamheid in het onderwijs van de Universiteit Leiden.

Nederland heeft niet veel ‘wilde natuur’. Naar verhouding hebben we juist wél veel intensief gebruikte landbouwgrond. Voor de natuur is dus veel winst te boeken als we de functies ‘natuur’ en ‘landbouw’ beter laten samengaan. Geen eenvoudige zaak, in een dichtbevolkt land als Nederland.

Aan de Universiteit Leiden heb je alle ruimte om in het buitenland te studeren of stage te lopen. Lees verder over de mogelijkheden er zijn.

Op 25 november 2018 verdedigde Laurens de Hoog zijn proefschrift 'De prioriteitsregel in het vermogensrecht'. Het promotieonderzoek is begeleid door promotor prof. mr. W.G. Huijgen.

Promotores: P. Stevenhagen, L. van Geemen (Università degli studi di Milano), Co-Supervisor: Ronald M. van Luijk