606 zoekresultaten voor “us electron” in de Publieke website
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The endocannabinoid system in zebrafish larvae
In this thesis, we have studied the potential of the zebrafish larval model in studying the ECS, as a complementary model to the existing rodent models.
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The activation mechanisms of G protein-coupled receptors: the case of the adenosine A2B and HCA2/3 receptors
Promotor: A.P. IJzerman
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Using soil inoculations for ecological restorations
How soil microbial composition impacts structure and composition of the aboveground plant and animal communities?
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Pattern mining for label ranking
Promotor: J.N. Kok, Co-promotor: C.M. Soares, A.J. Knobbe
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Latency, Energy, and Schedulability of Real-Time Embedded Systems
Systems are called real-time systems, if the correctness of the system does not only depend on the correctness of the system output but also on whether the output is delivered on time.
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Error bounds for discrete tomography
Promotores: K.J. Batenburg, B. Koren
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Extremely loud & incredibly far: observing radio bright AGN into the cosmic dawn
In this thesis new methodologies are developed for the detection and systematic study of radio sources in the early universe. This allows us to gain a deeper understanding of the formation and evolution of galaxies, the activity of supermassive black holes, and the final phase transition of our universe:…
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Resolving gas-phase metallicity in galaxies
Galaxies are environments where gas coalesces, cools, and is converted into stars. However, it remains unclear the exact mechanisms through which galaxies acquire, redistribute and lose their gas.
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Tuesday Talks: Science Insights | 3 september 2024
Lezing, Tuesday Talks: Science Insights
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Livestream promotie
Op deze pagina kunt u promoties van onderzoekers van de Universiteit Leiden live volgen via streaming video.
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NeCEN genoemd als topfaciliteit voor elektronenmicroscopie
'Het Nederlands Centrum voor Elektronen Nanoscopie (NeCEN) is een mooi voorbeeld van een faciliteit die op nationale schaal toegang biedt tot de laatste ontwikkelen op het gebied van cryo-elektronen microscopie', dat schrijft Sriram Subramaniam, een vooraanstaand leider in deze tak van sport, in het…
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Milan Allan wint Bryan R. Coles Prize
Milan Allan heeft de Bryan R. Coles Prize gewonnen op de International Conference on Strongly Correlated Electron Systems (SCES) in Praag.
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Noortje Dannenberg
Wiskunde en Natuurwetenschappen
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Bacteriën bevriezen en fotograferen
Hoe weet een bacterie waar er voedsel is in zijn omgeving? En hoe beweegt die bacterie vervolgens naar dat voedsel toe? Hoogleraar Ultrastructuurbiologie Ariane Briegel nam het publiek mee op een microscopische reis tijdens haar lezing ‘Zooming in on bacterial behaviour’ voor het Natuurwetenschappelijk…
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Impact of plant hormones on growth and development of actinobacteria
Plants are colonized by an astounding number of microorganisms that can provide different life-support functions, including nutrient acquisition and protection against (a)biotic stresses like drought or pathogen attack.
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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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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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Astrophysical plasma modeling of the hot Universe: Advances and challenges in high-resolution X-ray spectroscopy
Hot astrophysical plasma is ubiquitous in the Universe, from comets in our Solar system to the largest scale structures -- the cosmic web filaments. These hot plasmas, with the temperature of a few millions of degrees, are often observed in the X-ray wavelength range.
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Global Fields and Their L-functions
Artin L-functions associated to continuous representations of the absolute Galois group G_K of a global field K capture a lot of information about G_K as well as arithmetic properties of K.
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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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Resolving the building blocks of galaxies in space and time
We investigate the buildup of galaxies from various vantage points. The first two chapters focus on the stellar content of galaxies, especially the distribution of stellar masses at birth and potential variations therein in various galactic environments.
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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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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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CE-MS for metabolomics: advancing performance and detection sensitivity
The major and ultimate aim of metabolomics is to obtain an answer to a specific biological or clinical question.
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Lava worlds: characterising atmospheres of impossible nature
Over the last three decades, the discovery of exoplanets has revealed the boundless variety of worlds beyond our own Solar System. Majority of planetary systems contain short-period planets that are larger than Earth but smaller than Neptune.
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Boek over Integratie van Immigranten: "The Civic Citizens of Europe" door Moritz Jesse
Moritz Jesse, Universitair Hoofddocent Europees Recht aan het Europa Instituut, heeft zijn boek “The Civic Citizens of Europe: The Legal Potential for Immigrant Integration in the EU, Belgium, Germany, and the United Kingdom
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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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Dynamics of the Oort Cloud and Formation of Interstellar Comets Santiago Torres Rodriguez
The solar system was formed approximately 4.56 billion years ago. Despite the numerous theories that have been developed over the years, the formation and evolution of the solar system still remain unclear.
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Simulating the birth environment of circumstellar discs
Circumstellar discs are the reservoirs of gas and dust that surround young stars and have the potential to become planetary systems.
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Mining the kinematics of discs to hunt for planets in formation
Detecting planets during their formation stages is crucial for understanding the history and diversity of fully developed planetary systems like our own. However, observing young planets directly is challenging because they are often deeply embedded within their host protoplanetary discs, rich in gas…
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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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Student for a day South and Southeast Asian Studies
Studievoorlichting
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Student for a day Philosophy: Global and Comparative Perspectives
Studievoorlichting
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Student for a day Arts, Media and Society
Studievoorlichting
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Student for a day International Studies
Studievoorlichting
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Student for a day African Studies
Studievoorlichting
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Student for a day Urban Studies
Studievoorlichting
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Radicalisation: The Use of the Internet by Islamic State Terrorists in the US (2012-2018)
Promotie
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Only the dead can tell us: on ancestor worship, law, social status and gender norms in Ancient Egypt
Promotie
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De magie van vloeibaar helium: deze persoon maakt ijskoud onderzoek in Leiden mogelijk
Witte wolken ijskoud gas die over de vloer stromen. Magisch, maar ook uitkijken dat je vingers er niet afvriezen. We hebben het natuurlijk over vloeibaar stikstof en helium. Misschien heb je de spectaculaire Freezing Physics-wetenschapsshow van de studentenorganisatie Stichting Rino weleens gezien.…
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Rachel Doherty wint de LION Image Award met viraal microbootje
De jaarlijkse LION Image award gaat naar de foto van een 30 micrometer lang 3D-geprint bootje dat in oktober viraal ging, ingediend door Rachel Doherty van de groep van Daniela Kraft.
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PhD Position on Understanding the Global Movement for Open Research Information
Sociale Wetenschappen, Centrum voor Wetenschaps- en Technologiestudies
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Feodor-Lynen onderzoeksbeurs voor Bela Bode
Dr. Bela Bode ontvangt van de Alexander von Humboldt-stichting de Feodor Lynen onderzoeksbeurs voor de ontwikkeling van nieuwe methoden voor verbetering van het signaal in de vaste stof NMR. Hij streeft naar een specifiek analytisch instrument voor oppervlakte-studies en onderzoek over membranen en…
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Life Sciences Café op bezoek bij NeCEN
Op 21 maart vond het Life Sciences Café eenmalig plaats bij NeCEN. Zo’n 60 buren van het Leidse BioScience Park bezochten de faciliteit voor cryo-elektronenmicroscopie voor een kijkje achter de schermen. Volgens hoofd van NeCEN Ludo Renault was de avond een groot succes.
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Briegel ontvangt beurs Moore Foundation in wereldwijde competitie
Ariane Briegel, hoogleraar Ultrastructuurbiologie in Leiden, heeft een prestigieuze beurs ontvangen van de Gordon and Betty Moore Foundation. Met de toekenning van 800.000 euro zet Briegel een nieuwe onderzoekslijn op om symbiotische interacties op nanoschaal te bestuderen.
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Structured Parallel Programming for Monte Carlo Tree Search
The thesis is part of a bigger project, the HEPGAME (High Energy Physics Game). The main objective for HEPGAME is the utilization of AI solutions, particularly by using MCTS for simplification of HEP calculations.
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Leids Instituut voor Onderzoek in de Natuurkunde
Onderzoek aan het Leids Instituut voor Onderzoek in de Natuurkunde (LION) is fundamenteel en nieuwsgierigheids-gedreven. Al onze wetenschappers delen de wens om de kennis van de wereld om ons heen te vermeerderen, in een open, nieuwsgierige sfeer, waarin innovatieve ideeën ontstaan die toepassingen…
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C-SCAPE - Sandy strategies for sustainable coastal climate change adaptation
What is the optimal design of sandy solutions for sustainable climate change adaption, from an ecological, biophysical and societal point of view?
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Macro-level assessment of environmental implications of changes to circularity
How to ensure the environmental and economic benefits of circularity transition at macro-scale?
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Corporate Governance & Strategy
De onderzoeksgroep Corporate Governance en Strategie onderzoekt hoe, met wie en voor wie een onderneming waarde creëert/vastlegt, met als doel de praktijk en beleidsmakers te informeren over kwesties rondom bestuur. De onderzoeksgroep focust zich op het duale karakter van de onderneming. Namelijk als…