1,360 zoekresultaten voor “lion pollution” in de Publieke website
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Optical Near-Field Electron Microscopy
In this thesis, we develop a novel technique called Optical Near-field Electron Microscopy (ONEM), which aims to combine the advantages of both optical and electron microscopy: the high resolution of electron microscopy and the low sample damage of optical microscopy.
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Interactions from lipid membrane deformations
Biological cells, the basic building blocks of all life forms, are surrounded by a lipid membrane. More than half of the membrane is occupied by membrane proteins, which can regulate the cell functionality through specific arrangements.
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Origami metamaterials : design, symmetries, and combinatorics
In the first part of this thesis we study the geometry of folding patterns.
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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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Nano-scale electronic structure of strongly correlated electron systems
In condensed matter systems electron-electron interactions, negligible in everyday metals, can dramatically alter the electronic behavior of the system. Examples of such altered behavior include high-temperature superconductivity and modulation of the electron density.
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Manipulating carbon nanotubes Towards the application as novel field emission sources
Promotores: T.H. Oosterkamp, N. de Jonge
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Colloidal mechanical metamaterials
This thesis describes how to scale down concepts of macroscopic mechanical metamaterials to the thermal scale using a system of flexibly-linked colloids.
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Forces and symmetries in cells and tissues
The way organisms develop from the initial single-cellular state to a complex final assembly like the human body, and how the final body is maintained throughout life, is one of the greatest mysteries and it’s understanding one of the biggest scientific challenges.
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Insights into microtubule catastrophes: the effect of end-binding proteins and force
For each living organism health is ensured by correct functioning of its cells. Cells therefore have elaborate methods for regulation of their proteins.
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Dynamics of coupled quantum systems
Thermodynamics is one of the founding scientific pillars that has helped us better understand heat engines, biology, ecosystems, and even black holes. While it fundamentally describes large systems by examining the bulk behavior of their constituents, it is anchored in the statistical equivalence of…
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Higgs dynamics in the early universe
In the early universe, the dynamics of the Higgs field can give rise to many interesting phenomena.
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Acquired resistance in pancreatic cancer: characterization and exploration of actionable targets of a multifactorial disease
Pancreatic ductal adenocarcinoma (PDAC) is among the cancers with the highest mortality rate, despite a relatively low incidence.
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Experimental quantum position verification: practical challenges and single-photon correlations
Quantum position verification (QPV) - the subject of this thesis - is a novel way to authenticate unknown nodes in a quantum network without the need to physically meet up.
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Lisa DörnerFaculteit der Wiskunde en Natuurwetenschappen
l.doerner@biology.leidenuniv.nl | 071 5275045
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Stable single molecules for quantum optics and all-optical switches
Promotor: Prof.dr. M.A.G.J. Orrit
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Imaging complex model catalysts in action
From surface science towards industrial practice using high-pressure scanning tunneling microscopy.
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Effects of heavy fields on inflationary cosmology
Promotor: A. Achúcarro, Co-Promotor: J.W. van Holten
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Quantum dots in microcavities: From single spins to engineered quantum states of light
A single self-assembled semiconductor quantum dot in a high-finesse optical microcavity - the subject of this thesis - is an interesting quantum-mechanical system for future quantum applications. For instance, this system allows trapping of an extra electron and thus can serve as a spin quantum memory,…
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Spin dynamics in general relativity
Promotor: J.W. van Holten
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Synthetic model microswimmers near walls
Synthetic microswimmers take an important place within the interdisciplinary field of active soft matter.
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Strategies for Mechanical Metamaterial Design
On a structural level, the properties featured by a majority of mechanical metamaterials can be ascribed to the finite number of soft internal degrees-of freedom allowing for low-energy deformations.
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Cavity quantum electrodynamics with rare-earth ions in solids
Promotor: Prof.dr. D. Bouwmeester, Co-Promotor: M.J.A. de Dood
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On metrics and models for multiplex networks
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.
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spFRET studies of nucleosome dynamics modulated by histone modifications, histone variants and neighboring nucleosomes
Promotor: Prof.dr. T. Schmidt, Co-Promotor: S.J.T. van Noort
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T-CYCLE EPR: Development at 275 GHz for the study of reaction kinetics & intermediates
A difficulty of studies on chemical kinetics are the reaction time scales and detection of their intermediates.
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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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Photosynthetic light reactions at the gold interface
Promotor: T.J. Aartsma, Co-promotor: R.N. Frese
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The holographic glass bead game: from superconductivity to time machines
Promotores: Prof.dr. J. Zaanen, Prof.dr. K.E. Schalm
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Photothermal studies of single molecules and gold nanoparticles: vapor nanobubbles and conjugated polymers
Promotor: M.A.G.J. Orrit
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Photothermal circular dichroism studies of single nanoparticles
In this work, we investigate the minute circular dichroism effects of single nanoparticles.To this aim, we apply photothermal imaging with a polarization-modulated heating beam.
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Oxidation catalysis on Pt and Au: complexity of simple chemistry
Promotor: J.W.M. Frenken Co-Promotores: I.M.N. Groot; L.B.F. Juurlink
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The structure of a working catalyst: from flat surfaces to nanoparticles
Promotor: Prof.dr. J.W.M. Frenken
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Mechanical metamaterials: nonlinear beams and excess zero modes
Mechanical metamaterials are man-made materials which derive their unusual properties from their structure rather than their composition.
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HuygensNiels Bohrweg 2, Leiden
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Probing the properties of dark matter particles with astrophysical observations
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.
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Statistical physics and information theory for systems with local constraints
Systems with local constraints is a new finding in recent researches on complex systems. The heterogeneous spatial interactions and the temporal dependencies among those numerous units make it difficult to describe by traditional statistical physics.
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Tatiana Afanassjewa-publiekslezingen over natuurkunde
De Tatiana Afanassjewa-lezingenreeks is een reeks publiekslezingen op woensdagavonden waarvoor iedereen met natuurkundige belangstelling van harte is uitgenodigd.
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Enlightening the Primordial Dark Ages
This thesis is dedicated to the exploration of the primordial dark ages: unknown physics during the earliest stages of the Universe’s expansion that have not yet been directly probed by observations. Cosmic inflation is a burst of exponential expansion of space after the “Big Bang”.
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Capturing dynamics with noisy quantum computers
Quantum computing represents a fundamentally new computational paradigm, capable of addressing problems that are intractable for classical computers.
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De wereld is quantum (voorjaar 2024)
Quantummechanica voor iedereen
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Quantum Limits
Grenzen van quantum-theorieën verleggen, dat is precies waar de natuurkundigen van de Universiteit Leiden goed in zijn. Leidse onderzoekers starten acht nieuwe quantum-onderzoeksprojecten binnen het consortium Quantum Limits.
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Aanbod
Hieronder vind je een overzicht van alle PRE-Classes die door de verschillende opleidingen van de Universiteit Leiden worden verzorgd. Bij elk onderdeel kun je een inhoudelijke beschrijving vinden en meer specifieke informatie over de eisen die aan deelname aan de betreffende Class verbonden zijn.
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Hoe maak je citizen science succesvol?
Om het probleem van plasticvervuiling in kaart te brengen is er veel data vanuit een groot gebied nodig. Daarom schakelen wetenschappers steeds vaker de hulp in van vrijwilligers, ook wel bekend als citizen science. Maar wat zijn de uitdagingen voor een onderzoeker wanneer hij of zij het publiek op…
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Subsidies en benoemingen voor microbioomonderzoek, enzymontwikkeling en meer
Onderzoekers van de faculteit Wiskunde en Natuurwetenschappen werken elke dag aan de grenzen van het weten en aan oplossingen voor de maatschappelijke uitdagingen van nu. Hiervoor ontvangen zij subsidies, prijzen en andere onderscheidingen. Wij zetten hen in de schijnwerpers.
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De jacht op nanoplastics
Hoe gevaarlijk zijn micro- en nanoplastics? Hebben ze invloed op het milieu? Zijn ze schadelijk voor ons lichaam? Deze vragen kunnen we dankzij Fazel Abdolahpur Monikh eindelijk gaan beantwoorden. Samen met zijn collega’s ontwikkelde hij een methode om plasticdeeltjes van nanoformaat te detecteren en…
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Hans Slabbekoorn over dove vogels rondom luchthavens
Vogels rondom luchthavens zijn agressiever en zingen alsof ze gehoorverlies hebben. Gedragsbioloog Hans Slabbekoorn kwam samen met onderzoekers van Manchester Metropolitan University tot verrassende resultaten over de impact van door mensen veroorzaakt lawaai op vogels rondom vliegvelden.
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Hans Slabbekoorn bij NPO Radio 1 over de effecten van mensenlawaai
Gedragsbioloog Hans Slabbekoorn van het Instituut Biologie Leiden was te gast in het wetenschapsprogramma Focus Wetenschap. Hij sprak er over de impact van menselijke herrie.
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Leids onderzoek naar corona-afval belandt in New York Times
Mondkapjes en plastic handschoenen moeten ons beschermen tegen corona, maar vormen een steeds groter probleem voor het milieu. In een special van de New York Times vertellen de Leidse bioloog Liselotte Rambonnet en alumnus Auke-Florian Hiemstra over hun onderzoek hiernaar, en de speciale website die…
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Bacheloronderzoek over alpenwatersalamander in Roots magazine
Roots magazine besteedt in het aprilnummer uitgebreid aandacht aan de flamboyante alpenwatersalamander. Bachelorstudenten Jody Robbemont en Lisanne van Veldhuijzen hebben onderzoek gedaan naar deze soort in het lab van Ben Wielstra, verbonden aan de Universiteit Leiden en Naturalis Biodiversity Cent…
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Onderzoek
Onderzoekers vanuit verschillende vakgebieden werken samen om oplossingen te bedenken voor maatschappelijke problemen.