This thesis has three main parts. The first part gives an algorithm to compute Hilbert modular polynomials for ordinary abelian varieties with maximal real multiplication. Hilbert modular polynomials of a given level b give a way of finding all of the abelian varieties that are b-isogeneous to any given…

Studievoorlichting

Een team Leidse onderzoekers heeft de Ammodo Science Award ontvangen om innovatief geesteswetenschappelijk onderzoek te doen naar de beleving van cultureel erfgoed. Ze onderzoeken hoe 'spel', zoals de videogame Minecraft, kan bijdragen aan een dieper begrip van het verleden.

Promotie

Wiskunde en Natuurwetenschappen, Leids Instituut voor Chemisch Onderzoek (LIC), Leids Instituut voor Onderzoek in de Natuurkunde (LION)

The project Multimedia Research and Documentation of African Oral Genres: Connecting Diasporas and Local Audiences (Director: D.Merolla) focuses on multimedia as technology that allows scholars to share documentation and scientific knowledge with the cultural owners of the collected oral genres.

In summary, the collective results described in this thesis show that nanoparticulate vaccines can be delivered intradermally by coated and hollow microneedles and evoke antigen-specific immune responses.

Sinds 2015 roepen de Verenigde Naties 11 februari uit tot International Day of Women and Girls in Science. De Universiteit Leiden organiseerde een publieksevenement met lezingen en discussies voor ruim honderd geïnteresseerden. Tussen een lezing over de bouwstenen van leven en een talkshow over de impact…

The plant hormone auxin plays a central role in the growth and development of plants. Auxin acts in a concentration dependent manner and polar cell-to-cell transport of this hormone determines its distribution in the tissues of plants. This polar auxin transport is mediated by several families of auxin…

What is the environmental impact, the human health impact and the life cycle and production costs of the lab, pilot and commercial diffusion of nanowires and nanowire-based photovoltaic technologies?

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The mycorrhizal symbiosis is among the most widespread species interactions on Earth⁠. This thesis focuses on orchid mycorrhiza, a unique mycorrhizal type that has caught scientists’ attention for centuries⁠.

Leiden is in 2022 European City of Science en dat wordt gevierd onder de naam Leiden2022. Tijdens Leiden2022 worden verschillende activiteiten georganiseerd, zoals lezingen, workshops, excursies en tentoonstellingen. Ter gelegenheid van Leiden2022 is ook Postbus 71 geopend: de plek waar je met al je…

The next generation of high-contrast imaging instruments on space-based observatories requires sophisticated wavefront sensing and control in addition to a high-performance coronagraph.

Studievoorlichting

Self-assembly is an abundant process in nature and is vital to many processes in living organisms.

Microbiome composition of the spermosphere and the rhizosphere of wild and modern bean accessions grown in an agricultural and a native soil from Colombia was characterized by metagenomics and cultivation-dependent approaches.

Promotor: P.M. Brakefield

Bacteria are highly complex and diverse organisms that have adapted to survive in ecological niches ranging from the most extreme to the most heterogeneous environments.

Promotor: R. Verpoorte, Co-promotores: Y.H.Choi, N.R. Mustafa

Understanding the formation and evolution of planetary systems is one of the most fundamental challenges in astronomy. To directly image and study young exoplanets and the circumstellar disks they form from, dedicated high-contrast imaging instruments are built.

Op 11 november 2021 verdedigde Mariana Gkliati het proefschrift 'Systemic Accountability of the European Border and Coast Guard'. Het promotieonderzoek is begeleid door promotoren prof.dr. P. Rodrigues en prof.dr. L. Besselink (UvA).

This project uses archaeological, literary and epigraphic evidence to investigate urban development in Roman-period North Africa, compiling this in a GIS-linked database in order to analyse the development of urban settlement spatially over time.

Herken je dat: je ziet je vriend lachen, en plots begin je ook te grijnzen? Promovendus Chris Riddell doet onderzoek naar hoe en waarom we lichaamstaal kopiëren. Hij neemt je als nieuwe Face of Science een jaar lang mee in zijn onderzoek.

Engelsen hebben een groot normbesef als het gaat om taal: in formele situaties hoor je beschaafd Engels te spreken. Toch zijn de meesten tijdens het dagelijks taalgebruik wel een stukje milder in hun oordeelen bepaalde zinsconstructies te vermijden. Dat blijkt uit een onderzoek van taalkundige Carmen…

Acidobacteria is a widely distributed phylum but their functional roles in ecosystem processes are still largely elusive.

Due to their central physiological roles in living organisms, retaining beta-glycosidases have been the subject of tremendous research efforts to examine their structure/function relation using numerous biophysical and biochemical approaches.

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

Promotor: H.S. Overkleeft, J. Neefjes, Co-promotor: M. van der Stelt

This thesis presents the systematics, epidermal defense, and bioprospecting of wild orchids.

How to contribute to a quantum leap of eco-industrial symbiosis in China?

Promotores: F.H.J. Redig, W.T.F. den Hollander

Op 21 maart 2019 verdedigde James Welch zijn proefschrift 'The Grotius Sanction: Deus Ex Machina. The legal, ethical, and strategic use of drones in transnational armed conflict and counterterrorism'. Het promotieonderzoek is begeleid door promotor prof. dr. P.B Cliteur.

Op 23 oktober 2019 verdedigde Yoram Stein zijn proefschrift 'Spinoza's Theory of Religion: The Importance of Religion in Spinoza's Thought and Its Implications for State and Society'. Het promotieonderzoek is begeleid door promotor prof.dr. P.B. Cliteur en prof.dr. A.A.M. Kinneging.

De Leidse Schouwburg brengt wetenschap naar het theater dit seizoen. Op 15 mei is de Science Battle, een avond waarbij jonge wetenschappers op een begrijpelijke manier over hun onderzoek vertellen. Wie dat het beste doet? Dat bepaalt het publiek!

How to bring together different footprints into an integrated family and what are the synergies? What are the roles of inventory analysis and characterization in measuring individual footprints and how these affect a footprint family? How to benchmark environmental footprints against related planetary…

Promotores: H.S. Overkleeft; G.A. van der Marel Co-Promotor: B.I. Florea

Cardiovascular diseases are among the most frequent causes of death in the world. The main underlying pathology of cardiovascular diseases is the development of atherosclerosis in the medium and large-sized arteries.

Promotores: H.S. Overkleeft, G.A. van der Marel, Co-promotor: B.I. Florea

This thesis consists of three papers that are centered around the common theme of Hausdorff uo-Lebesgue topologies and convergence structures on vector lattices and on vector lattices and vector lattice algebras of order bounded operators.

Moderne computergestuurde simulatietools die diverse industrieën gebruiken, produceren gigabytes aan data. Maar momenteel kost het dagen of zelfs weken om die gegevens te verwerken. Om zo goed mogelijk gebruik te maken van al deze data, ontwikkelt het DAMIOSO-project algoritmen en middelen om deze enorme…

What is the environmental impact of different waste collection systems across Europe? How can the collection be improved when considering collection, sorting, and treatment, as well as use options for secondary materials?

The long-held desire - to link structure directly to function and to explain molecular mechanisms based on basic chemical or physical principles - is finally coming closer, satisfying not only our scientific curiosity but also offering new solutions to the many challenges in the field of health, energy…

Promotor: Prof.dr. E. Smets, M. Stech

Promotor: Prof.dr. H.P. Spaink, Co-promotor: Dr. B.E. Snaar

The radio sky harbours both galactic and extragalactic sources of arcminute- to degree-scale emission of various physical origins. To discover extragalactic diffuse emission in the Cosmic Web beyond galaxy clusters, one must image low–surface brightness structures amidst a sea of brighter compact fore-…

A management strategy has been developed for field margins to reduce pesticide drift to non-target areas and to promote biodiversity on arable land. To this end, 3 and 6 m wide strips along the edges of winter wheat, sugar beet and potato crops have been left unsprayed with herbicides and insecticides…

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