460 zoekresultaten voor “plastic some” in de Publieke website
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Groene initiatieven
Handen uit de mouwen voor duurzaamheid! Dat doen medewerkers en studenten op verschillende manieren, thuis en op de universiteit.
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On the Galois closure of commutative algebras
Promotores: H.W. Lenstra, B. Erez, Co-promotor: L. Taelman
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Musems, Collections and Society | Yearbook 2021
In this Yearbook you will find some fascinating examples of what was done in 2021, not only by ourselves, but also by our international colleagues.
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A fixed point approach towards stability of delay differential equations with applications to neural networks
Promotor: S.M. Verduyn Lunel, Co-Promotor: O.W. van Gaans
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CanalCups: op weg naar plasticvrije grachten
Twee weken ná 3 oktober lagen de Leidse grachten nog steeds vol met plastic wegwerpbekertjes. Auke-Florian Hiemstra heeft samen met medestudenten duizenden van deze bekertjes opgevist en gefotografeerd. Nu plaatsen zij elke dag één van deze 'canal cups' op Instagram.
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On Products of Linear Error Correcting Codes
In this thesis we study products of linear error correcting codes.
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Profinite groups with a rational probabilistic zeta function
Promotores: H.W. Lenstra, A. Lucchini
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Hoelang laat een wereldwijd plasticverdrag nog op zich wachten?
Plasticvervuiling is wereldwijd een gigantisch probleem. In Genève buigen wereldleiders hun hoofd over een eventueel plasticverdrag. Universitair docent Esther Kentin sprak met NU.nl over de VN-top: ‘Een verdrag is maar een klein onderdeel van de oplossing.’
- Ons verhaal
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Applying data mining in telecommunications
This thesis applies data mining in commercial settings in the telecommunications industry.
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Many objective optimization and complex network analysis
This thesis seeks to combine two different research topics; Multi-Objective Optimization and Complex Network Analysis.
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Steady-State Analysis of Large Scale Systems
Promotor: W.Th.F. den Hollander Co-Promotor: F.M. Spieksma
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Counting points on K3 surfaces and other arithmetic-geometric objects
This PhD thesis concerns the topic of arithmetic geometry. We address three different questions and each of the questions in some way is about counting how big some set is or can be.
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Shaping the pharmacokinetic landscape for renally cleared antibiotics in obesity
The prevalence of obesity (BMI >40 kg/m2) has increased rapidly over the recent years, not only in adults, but also in children and adolescents.
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Contributions to the phylogeny of the haplolepideous mosses
The haplolepideous mosses (Dicranidae) comprise about 4000 species distributed over a wide range of habitats, with great gametophytic and sporophytic morphological variation. Their monophyly is well supported by the results of several molecular phylogenetic studies, which shed light on their relationships…
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Quantum computation with Majorana zero modes in superconducting circuits
Promotor: Prof.dr. C.W.J. Beenakker
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Design, synthesis and application of paramagnetic probes for protein structure studies
The main subject of this thesis is the design and synthesis of paramagnetic molecules for protein studies with NMR and EPR spectroscopy.
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X-raying extragalactic gas: warm-hot gas in the EAGLE simulations
I have studied the hot, diffuse gas around and between galaxies. Specifically, I have used the EAGLE numerical simulations of galaxy formation to predict the properties of this gas, and I have used those properties to predict specific observables: soft X-ray absorption and emission lines.
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Carcinogenicity of insulin analogues
Promotor: Prof.dr. B. van de Water
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Applications of AdS/CFT to strongly correlated matter: from numerics to experiments
What physics controls the properties of quantum matter, such as how electrons flow inside high-temperature superconductors? This question has captivated the physics community and industry for decades, in part due to the great technological potential such materials have, but also because they have resisted…
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RAISE Onderzoek
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…
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Semigroups on Spaces of Measures
Promotor: S.M. Verduyn Lunel, Co-promotor: S.C. Hille
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Opening academisch jaar 2017-2018
De opening van het academisch jaar 2017-2018 vond plaats op maandag 4 september 2017 in de Pieterskerk.
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Unveiling dark structures with accurate weak lensing
Improvements of weak gravitational lensing shape measurements are presented and some used for data analysis.
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Lopende projecten
Huidige cliënten
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Bin Your Butt
Nieuw op de campus: peukenstemmers. Heb jij ze al gespot? Drop hieronder jouw briljante, non-scientific vraag en wie weet wordt die de volgende butt-kicker!
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Knowledge extraction in the quantum random-oracle model
The aim of this thesis is to present novel techniques for proving cryptographic schemes secure against quantum adversaries. Most results are within the context of an idealized model called the ‘quantum random-oracle model’.
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Spin-momentum locking in oxide interfaces and in Weyl semimetals
Electrons in a crystal lattice have properties that may differ from those of a free electron in vacuum.
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Topics in the arithmetic of del Pezzo and K3 surfaces
Promotores: P. Stevenhagen, L. van Geemen (Università degli studi di Milano), Co-Supervisor: Ronald M. van Luijk
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Inhibitor Selectivity: Profiling and Prediction
Less than 1 in 10 drug candidates that enter phase 1 clinical trials actually gets approved for human use.
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Netwerk en projecten
Netwerk en projecten duurzaamheid verduurzaming green office en green team
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Suppen voor Sustainability
We gingen het water op! Op zaterdag 30 augustus 2025 gingen onze studenten samen met Plastic Soup Surfer Merijn Tinga de Leidse grachten op om te suppen én afval uit het water te vissen.
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Projecten
Projecten van de afdeling Environmental Biology
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Citizen Science Lab
In het Citizen Science Lab ontwikkelen wetenschappers, burgers en maatschappelijke partijen innovatieve onderzoeksprojecten om gezamenlijk nieuwe wetenschappelijke kennis te vergaren. Hier vindt u meer informatie over het Citizen Science Lab, projecten waaraan u kunt deelnemen en hoe u projecten zelf…
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Decompositions in algebra
We show that Kirchhoff ’s law of conservation holds for non-commutative graph flows if and only if the graph is planar. We generalize the theory of (Euclidean) lattices to infinite dimension and consider the ring of algebraic integers as such a lattice.
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Counting curves and their rational points
n this thesis we study curves. In the first half, we study moduli spaces of curves and Gromov-Witten invariants, certain kinds of curves counts. We employ logarithmic geometry for this.
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On topological properties of massless fermions in a magnetic field
Make more fluid: In condensed matter systems, electrons can acquire unusual properties from their interaction with the atomic lattice.
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Afvalscheiding
Wat is beter voor afvalrecycling: een plastic, papieren of keramische beker? Een biobased of fossiele coating? Afval sorteren bij de bron of bij een recyclingbedrijf? Vraag het aan tien experts en je krijgt tien verschillende meningen. Over één ding zijn we het allemaal eens: niets doen is geen optie.…
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Onderzoek bij het Levend Lab
Wat doen bestrijdingsmiddelen, bemesting of plastic met de waterkwaliteit? En hoe beïnvloeden wind en regen de data? Dat en meer onderzoeken de Leidse milieuwetenschappers in de 32 sloten van het Levend Lab.
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De MSC Zoe-milieuramp: verloren containers in zee en het recht op milieu-informatie
Verloren lading op zee moet worden beschouwd als milieuvervuiling en informatie hierover moet openbaar worden gemaakt, maar dat gaat niet altijd goed.
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Steden van het Romeinse Nabije Oosten
Het belangrijkste doel van dit onderzoek is om de steden van het Romeinse Nabije Oosten in de keizertijd in kaart te brengen, met een focus op locatie, stadsgrootte en stedelijke kenmerken, om de vorm van het stedelijke systeem en de niveaus van integratie te bestuderen.
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Arakelov inequalities and semistable families of curves uniformized by the unit ball
The main object of study in this thesis is an Arakelov inequalitywhich bounds the degree of an invertible subsheaf of the direct image ofthe pluricanonical relative sheaf of a semistable family of curves.
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On Multifield Inflation, Adiabaticity and the Speed of Sound of the Curvature Perturbations
Promotor: A. Achúcarro, Co-Promotor: G.A. Palma
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Kummer theory for commutative algebraic groups
This dissertation is a collection of four research articles devoted to the study of Kummer theory for commutative algebraic groups.
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Gas physics of simulated galaxy clusters
The largest structures in the Universe are clusters of galaxies. Each can contain hundreds to thousands of galaxies.
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Play by the rules? : coordination of EU sustainable development policies and the importance of the politico-legal context
There is an increasing amount of attention on EU and its Member States contributions to implementation of two landmark agreements: the Paris Climate Agreement and the UN Agenda 2030 with Sustainable Development Goals (SDGs). Absent from the current literature is an analysis of the political effect of…
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Logarithmic Hochschild homology and cohomology
In this thesis, we explore a Hochschild homology and cohomology-like notion for logarithmic schemes.
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The power of one qubit in quantum simulation algorithms
Quantum computing is an emerging technology, which holds the potential to simulate complex quantum systems beyond the reach of classical numerical methods.Despite recent formidable advancements in quantum hardware, constructing a quantum computer capable of performing useful calculations remains challenging.In…
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Next generation bacitracin: reimagining a classic antibiotic
Given the accelerating appearance of antimicrobial resistance, there is an urgent need for more fundamental research into novel antibiotic strategies. The work in this thesis helps to address this global problem by developing new antibiotic compounds, inspired by the antibacterial mechanisms of the…
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Control of early plant development by light quality
This thesis describes how different colours of light affect various aspects of the growth and development of Arabidopsis and tomato plants.