457 zoekresultaten voor “magnetic very” in de Publieke website
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Leidse sterrenkundigen ontdekken grootste deeltjesversneller in het heelal
Een team van voornamelijk Leidse astronomen heeft de grootste deeltjesversneller in het heelal ontdekt. Zij ontdekten dat bij een frontale botsing van vier gigantische clusters van sterrenstelsels deeltjes versneld worden tot zeer hoge energieën. De energieën zijn meer dan een miljoen maal hoger dan…
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Quantum computation with Majorana zero modes in superconducting circuits
Promotor: Prof.dr. C.W.J. Beenakker
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Explicit Computation of the Height of a Gross-Schoen Cycle
Arithmetic geometry concerns the number-theoretic properties of geometric objects defined by polynomials. Mathematicians are interested in the rational solutions to these geometric objects.
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Directe waarneming van lichtste exoplaneet
Een team bestaande uit de Leidse astronomen Tiffany Meshkat en Matthew Kenworthy heeft met behulp van ESO’s Very Large Telescope een zwak object in beeld gebracht dat met een heldere ster mee beweegt. Met een geschatte massa van vier of vijf keer die van Jupiter zou het de minst zware planeet buiten…
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Fermions and Bosons: Excitons in strongly correlated materials
Promotors: Prof.dr. J. Zaanen, Prof.dr.ir. H. Hilgenkamp
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The physics of nanowire superconducting single-photon detectors
Promotores: Prof.dr. D. Bouwmeester, Prof.dr. A. Fiore (TU Eindhoven)
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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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Verste quasar ontdekt
Een team van Europese astronomen heeft met behulp van ESO’s Very Large Telescope en tal van andere telescopen de tot nu toe verste quasar ontdekt en onderzocht. Dit heldere baken, dat van energie wordt voorzien door een zwart gat dat twee miljard keer zo zwaar is als de zon, is verreweg het helderste…
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Mogelijk protoplaneet in ‘stellaire baarmoeder’ waargenomen
Waarschijnlijk hebben astronomen met ESO’s Very Large Telescope voor het eerst een planeet-in-wording waargenomen die nog in een dikke schijf van gas en stof genesteld zit. De ontdekking is gedaan door een internationaal team van astronomen, onder wie Matthew Kenworthy van de Universiteit Leiden. Indien…
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Ontdekking studenten blijkt unieke planeet
Op 4 december werd de exoplaneet aan de astronomische wereld gepresenteerd, die eind vorig jaar door drie Leidse studenten onder leiding van Ignas Snellen is ontdekt. Het blijkt een uniek object te zijn, een stuk groter dan Jupiter, en met bijna vijf keer zijn massa.
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De blinde microscoop: van MRI op de nanoschaal tot academische vorming
Op vrijdag 25 mei is de oratie van Tjerk Oosterkamp over zijn leeropdracht 'Experimentele Natuurkunde'.
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Deciphering fermionic matter: from holography to field theory
Promotor: K.E. Schalm, Co-promotor: S.S. Lee
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Towards Optical Detection of a Single Electron
Single-molecule spectroscopy has become a powerful method for using organic fluorescent molecules in numerous applications.
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The urge to collect
Where does the urge to collect come from? What are the explicit or underlying reasons for gathering large amount of objects?
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The mechanical genome : inquiries into the mechanical function of genetic information
The four possible segments A, T, C and G that link together to form DNA molecules, and with their ordering encode genetic information, are not only different in name, but also in their physical and chemical properties.
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Coiled-coil mediated liposomal fusion: Asymmetric behaving peptide fusogens
Membrane fusion is a vital process in living organisms and is mediated by zipper-like proteins.
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Atmospheres of hot alien Worlds
Promotor: Prof.dr. I.A.G. Snellen, C.U. Keller
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Early Dutch Radio Astronomy (1940-1970)
Promotores: F.H. van Lunteren, F.P. Israel
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Joop Schaye in Volkskrant over reusachtig kosmisch spinnenweb
Het is de grootste structuur in het heelal: een duizelingwekkend web van materie dat sterrenstelsels zoals de Melkweg onderling verbindt. De Leidse Joop Schaye en Michael Maseda waren twee van de astronomen die hielp een piepklein stukje van dit 'kosmische spinnenweb' in beeld te brengen. In de Volkskrant…
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Strings and AdS/CFT at finite density
Promotores: J. Zaanen, A. Parnachev
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Merging galaxy clusters: probing magnetism and particle acceleration over cosmic time
In this thesis, I studied the origin and evolution of the non-thermal radiation in merging galaxy clusters.
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On transport properties of Majorana fermions in superconductors: free & interacting
Majorana fermions in superconductors are the subgap quasiparticle excitations that are their own antiparticles.
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Histone-DNA assemblies in archaea. Shaping the genome on the edge of life
All life on earth contains DNA, which is used to store biological information. Organisms compact their DNA in order for it to fit inside their cell(s).
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Cosmic particle acceleration by shocks and turbulence in merging galaxy clusters
In this thesis, I study the formation of large-scale structure and the physics of particle acceleration at large scales (~Mpc).
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Exploring the interactions of M dwarf winds and cosmic rays
This thesis focus on the interaction between M dwarf stellar winds and Galactic cosmic rays and the possible effects on the habitability of exoplanets.
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Applications of topology to Weyl semimetals and quantum computing
This thesis covers various applications of topology in condensed matter physics and quantum information.
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Topological phases and phase transitions in magnets and ice
The main focus of this thesis is the behaviour of two-dimensional materials, namely (anti)-ferromagnetic materials in the first two chapters, which show topological phases, and energetic square ice in the third and fourth chapter.
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Computational, biochemical, and NMR-driven structural studies on histone variant H2A.B
Nature uses a special class of histone proteins, histone variants, to modulate the properties of chromatin at defined genomic locations.
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Online Course Clinical Kidney, Pancreas and Islet Transplantation
Kidney transplantation is a major advance of modern medicine. This course will give you state of the art updates about what used to be an experimental, risky, and very limited treatment option more than 50 years ago and is now routinely performed in many countries worldwide.
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Huub de Groot
Wiskunde en Natuurwetenschappen
groot_h@chem.leidenuniv.nl | +31 71 527 4539
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Sterrenstelsels eten zich groot aan gaswolken, maar hoe?
Een sterrenstelsel kan groeien door gas uit zijn directe omgeving naar binnen te trekken. Maar astronomen weten nog niet precies hoe dit gebeurt. Sterrenkundige Joop Schaye gaat met een Europese onderzoekssubsidie van 1,5 miljoen euro op zoek naar antwoorden.
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Iron complexes as electrocatalysts for the water oxidation reaction
In this dissertation, the synthesis and characterization of a series of iron complexes based on different ligand platforms are described.
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Early death of massive galaxies in the distant universe
Promotor: M. Franx, Co-Promotor: I.F. Labbé
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Photo-activation of ruthenium-decorated upconverting nanoparticles
Metal-based prodrugs based on ruthenium(II) polypyridyl complexes have proven to be very suitable for application in both photodynamic therapy (PDT) and photo-activated chemotherapy (PACT).
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Developing systems for high-throughput screening of infectious diseases using zebrafish
Promotor: Prof.dr. H.P. Spaink, Co-promotor: Prof.dr. A.H. Meijer
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Predicting the future: Predictive control for astronomical adaptive optics
The field of exoplanet research is rapidly advancing through the development of new technology, observing techniques, and post-processing methods.
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Freedom of additional signals on genes: on the combination of DNA mechanics, genetics and translation speed
DNA carries various forms of information. Out of these forms of information the most well-known is classical genetic information.
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Distant star formation in the faint radio sky
One of the key quests in astronomy is to study the growth and evolution of galaxies across cosmic time. Radio observations provide a powerful means of studying the formation of stars and subsequent buildup of distant galaxies, in a way that is unbiased by the presence of dust.
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Balsaminaceae in Southeast Asia: systematics, evolution, and pollination biology
Balsaminaceae is a diverse plant family characterized by a huge floral morphological diversity.
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Measuring gold molecular gas across cosmic time
Tracing the evolution of the molecular gas content in galaxies is critical for a complete understanding of galaxy formation and evolution, as it provides the direct fuel for star formation. Studies of high-redshift (z>1) molecular gas reservoirs, most commonly traced by carbon monoxide (CO), have seen…
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Towards controlled microneedle-mediated intradermal immunization
Traditionally, vaccines are administered intramuscularly using conventional hypodermic needles, which cause pain and distress. Microneedles are very short needles (smaller than 1 mm) that are practically invisible to the naked eye.
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Causal Discovery from High-Dimensional Data in the Large-Sample Limit
Developing robust algorithms and theory for establishing cause-effect relationships from observational data that scale up to large data sets
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Cost-utility of a guided Internet-based intervention in comparison with attention only for people with HIV and depressive symptoms: A randomized
We found that, next to the effectiveness of the intervention, it’s also very likely that the intervention is cost-effective compared to attention only.
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Duurzaamheid
De Universiteit Leiden staat midden in de maatschappij en wil bijdragen aan een duurzame samenleving. Verduurzaming van gebouwen levert een bijdrage aan Nederlandse en Europese milieunormen. De Universiteit Leiden houdt daar in al haar bouwprojecten rekening mee.
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Optical cavities and quantum emitters
Optical cavities are useful tools to enhance the interaction between light and matter, which is important to make good quantum emitters. However, it turns out that the cavities themselves (without any quantum emitters) are already interesting objects to study.
- Lesmateriaal
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Pulses in singularly perturbed reaction-diffusion systems
Promotor: Arjen Doelman, Co-promotor: Vivi Rottschäfer
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Laser-generated toroidal helium plasmas
This dissertation is an experimental study of laser-generated, atmospheric pressure, transient toroidal helium plasmas.
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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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When galaxy clusters collide: the impact of merger shocks on cluster gas and galaxy evolution
Promotor: Prof.dr. H.J.A. Rottgering