Wanneer een fysisch systeem symmetrieën bezit gaan deze vaak gepaard met een representatie van de symmetriegroep op een Hilbertruimte. Groepsrepresentaties op Hilbertruimten zijn intensief onderzocht.

In this thesis we study products of linear error correcting codes.

In some condensed matter systems, such as the surface of a 3D topological insulator, the electrons are effectively massless and we must necessarily use the massless Dirac equation to describe them.

Congres/symposium

Promotor: G.R. de Snoo, Co-promotor: H.H. de Iongh, C.J.M. Musters

Om de veiligheid van de classroom scanners te controleren is op maandag 28 maart een zogenoemde pentest uitgevoerd in het Lipsius-gebouw. Daarbij werd een aantal personentellers voor één dag aangezet. Ethische hackers probeerden daarbij toegang te krijgen tot het systeem.

Veiligheidsdiensten opereren vaak in de schaduw, maar juist daar is ethiek essentieel. In zijn oratie pleit Michael Kowalski voor een expliciete, toegepaste ethiek als fundament onder inlichtingenwerk in een democratische rechtsstaat.

In deep reinforcement learning, searching and learning techniques are two important components. They can be used independently and in combination to deal with different problems in AI, and have achieved impressive results in game playing and robotics. These results have inspired research into artificial…

Cyberdaders vertonen veel overeenkomsten met ‘traditionele’ daders, maar er zijn ook veel verschillen. Nieuwsgierigheid, mentale uitdaging, bewijsdrang, maar ook introversie zijn kenmerken die vaker voorkomen. Dit blijkt uit onderzoek van Erasmus Universiteit Rotterdam en Universiteit Leiden, in opdracht…

The subject of this thesis, ‘Approach to Markov Operators on Spaces of Measures by Means of Equicontinuity’, combines an analytical and probabilistic approach to Markov operators.

This thesis describes the role of pollution, specifically neonicotinoid insecticides, as an actor of the ongoing biodiversity decline.

Lysosomal glycosidases are acid hydrolases that fragment glycoconjugates in lysosomes.

Low-carbon (LE) technologies have a significant potential to reduce the total carbon emissions in China.

Anthropogenic noise has been shown to affect marine animals in various ways, this may have fitness consequences at individual and population level. This thesis aims to increase insight into the quantification of sound-induced behavioural responses that are relevant to fitness, and into factors that…

This collection of papers was compiled in celebration of the remarkable academic career of Professor Wil Roebroeks, who has established himself as one of Europe’s leading figures in Palaeolithic archaeology over the past three decades and founded the Human origins research group at Leiden University…

Hoe kunnen studenten in mbo- en hoger onderwijsinstellingen het beste worden ondersteund in hun studiekeuze en studieloopbaan met het oog op soepele in- en doorstroom in opleiding en werk?

The soil ecosystem consists of the largest reservoir of biodiversity on Earth.

The thesis mainly contributes to the characterization of Majorana fermions as they appear in the Condensed Matter context.

The effects of anthropogenic noise on interactions between predators and their prey are still little understood.

Op 18 september 2019 verdedigde Huw Llewellyn zijn proefschrift 'An Institutional Perspective on the United Nations Criminal Tribunals: Governance, Independence and Impartiality'. Het promotieonderzoek is begeleid door promotoren prof.dr. N.M. Blokker en prof.dr. L.J. van den Herik.

The use of N fertilizers has increased worldwide in the past century. While this increased input of N has increased food productivity, it has also contributed to decreases in biodiversity, soil quality and environmental health, including increases in greenhouse gas emissions.

Nature uses a special class of histone proteins, histone variants, to modulate the properties of chromatin at defined genomic locations.

This thesis focuses on amyloid proteins, a class of proteins that convert into amyloid fibrils.

Promotor: G.R. de Snoo, Co-promotores: M.G. Vijver, J.P.M. Vink

The research described in this thesis combines the latest insights in lysosomal function with lysosome centred cell signalling.

This monograph focuses on clustering of objects in high-dimensional data, given the restriction that the objects do not cluster on all the attributes, not even on a single subset of attributes, but often on different subsets of attributes in the data.

Promotor: Prof.dr. J.M. van Ruitenbeek, Prof.dr. R.M. Tromp

Including modelling as part of software development appears to have various benefits.

Songbirds as vocal learners learn their songs and song preference from social tutors⁠. Tutor choice for both song and preference learning are important to characterize for understanding individual learning performance and cultural transmission of song⁠.

Promotores: Prof.dr. P.M. Brakefield, Prof.dr. B.J. Zwaan (Wageningen Universiteit)

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

Promotores: C.A.J. Knibbe; J.N. van den Anker, Co-promotores: H.P.A. van Dongen; B. van Ramshorst

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…

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.

Promotor: Prof.dr. H.J.A. Rottgering

Promotor: G.R. de Snoo, W. Kustiawan, Co-promotor: H.H. de Iongh

Promotor: Prof.dr. S. Haring

In this thesis, I targeted the orchid genus Lepanthes, one of the six genera of angiosperms that surpasses 1,000 species in the Neotropics, as a study model to investigate the evolutionary processes that promoted species diversifications.

Deze scriptie onderzoekt de complexiteit van wetsbesluiten binnen de EU, met een specifieke focus op de Raad van de EU.

-

Europees samenwerkings- en trainingsproject om fakenews te identificeren, voorkomen en te bestrijden.

De auteurs vergelijken aannames over het normatieve nut van de term 'milieuvluchteling' met empirische bewijs van die term anders dan 'milieumigrant'.

Promotores: Prof.dr. H Lenstra, Prof.dr. A Facchini (Padova University)

The studies in this thesis are focused on the physical effects in the flat band materials. The results contain the discovery of strong enhancement of RKKY spin-spin interactions with specific geometric arrangement and dynamical generation of excitonic order parameter with high magnitude.

This thesis is a collection of theoretical works aiming at adjusting quantum algorithms to the hardware of quantum computers.

In eight chapters, the thesis of Rafaël Vos covers the effect of temperature and pressure on the electrochemical CO2 reduction.

In this thesis, two potential therapeutic targets for diabetic nephropathy were dentified and investigated. First, we show that glomerular clusterin is upregulated in diabetic nephropathy and demonstrated that recombinant clusterin protein can protect the podocytes against oxidative stress in vitro.…

Promotores: J. Jonkers, K.E. de Visser

Kantorowicz en Voigt onderzoeken of federale systemen, met hun meerdere bestuursniveaus, leiden tot hogere constitutionele naleving.

In deze publicatie verkennen Sarah Louise Carthy en Bart Schuurman de realiteit van het benaderen en interviewen van moeilijk bereikbare bevolkingsgroepen.