297 search results for “darkness” in the Public website
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Galaxy alignments from multiple angles
Galaxies form and live inside dark matter haloes. As a consequence, they are exposed to the tidal fields generated by the surrounding matter distribution: this imprints a preferential direction to the galaxy shapes, which leads to a coherent alignment on physically close galaxies, called intrinsic a…
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The distribution of stellar mass in galaxy clusters over cosmic time
Promotor: Prof.dr. K.H. Kuijken, Co-Promotor: Dr. H.Hoekstra
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Light relief
How can new compounds relieve cancer patients of severe side effects?
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Theoretical Physics
Leiden has a strong tradition in theoretical physics, thoroughly linked with experimental disciplines.
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Identifying the origins of galaxy formation
This thesis investigates how galaxies form and what diversifies the evolutionary histories of galaxies.
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Research
Research at Leiden Observatory spans the full width of modern astrophysical enquiry. It is based on observation, theory, simulation, and experiment. Two broad clusters characterize the ongoing research. Within each theme, researchers carry out their personal and specialized research programme. The two…
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Fishing for neutrinos in the Mediterranean Sea
Physicists, including Dorothea Samtleben from Leiden University, are building a giant underwater telescope to unravel the origin of neutrinos and to solve the mystery surrounding dark matter. The first detector has now been installed. Once it is finished, the telescope will be three cubic kilometres…
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Scholarly Vices: A Longue Durée History
This project tries to explain the persistence of this cultural repertoire by zooming in on (1) interaction between idioms (cultural repertoires) available to scholars at certain points in time, (2) mechanisms that help transmit repertoires across time and place, and (3) rhetorical purposes for which…
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Writing the Earth, Darkly: Globalization, Ecocriticism, and Desire
References to nature and the environment in the Caribbean literary and the contemporary age of globalization.
- Matthieu Schaller Group - Numerical Cosmology
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Involvement in Bullying and Personality
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Non-linear astrochemical kinetics: theory and applications
This Thesis shows discoveries in non-linear astrochemical kinetics as well as a deeper analysis of dark clouds chemistry.
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Conrad's Shadow Catastrophe, Mimesis, Theory
Western thought has often dismissed shadows as fictional, but what if fictions reveal original truths?
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State Building Through Life Stories
State Building Through Life Stories: Incorporating Local Perspectives
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Liveable Planet Lunch Meeting: "The dark side of co-creation in sustainability research"
Lecture
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Cosmologists propose new way to form primordial black holes
What is dark matter? How do supermassive black holes form? ‘Primordial’ black holes might hold the answer to these long-standing questions. Leiden and Chinese cosmologists have identified a new way in which these hypothetical objects could be produced just after the Big Bang. Publication in Physical…
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International students explore the archaeology of Oss: ‘I was responsible for finding 50% of the pottery sherds’
The Municipality of Oss is a household name in the world of Dutch archaeology. For fifty years, Leiden archaeologists, in collaboration with residents of Oss, have been uncovering the history of the municipality. 2024 is the archaeological year of Oss! In a series of interviews we look back on fifty…
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Aggravating matters: accounting for baryons in cosmological analyses
Three major cosmology-focused missions are planned for the next decade: the Euclid space telescope, the Vera C. Rubin Observatory in Chile, and the Nancy Grace Roman Space Telescope.
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Science
We are very happy to welcome you to spend a semester or year studying with us in the Faculty of Science. Here you will find information on your course schedules and course and exam enrolment.
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Cosmic tomography with weak gravitational lensing
We explored the Universe using weak gravitational lensing, a phenomenon that occurs when light from distant galaxies is bent by the gravitational fields of closer cosmic objects, much like how a lens distorts light.
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Untangling cosmic collisions: a study of particle acceleration and magnetic fields in merging galaxy clusters
On the largest scale, the Universe resembles a cosmic spiderweb. Most galaxies coexist in small groups within the threads of this web. At the nodes of the threads are enormous groups of galaxies forming the largest structures in the universe still held together by gravity: clusters of galaxies.
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PhD Course Microscopy
This is a yearly event where we move in one week from the physics of light through the composition of the microscope, fluorescence microscopy and end up with some image analysis All the lectures are backed by practicals to really put your obtained knowledge into practice
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Harmonic duality : from interval ratios and pitch distance to spectra and sensory dissonance
This dissertation derives from the development of tools for algorithmic composition which extract pitch materials from sound signals, analyzing them according to their timbral and harmonic properties, putting them into motion through diverse rhythmic and textural procedures.
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Shaping Massive Galaxies: the structural evolution of galaxies across
Galaxies in the local Universe fall into two main categories of spirals and ellipticals. In this Thesis, we explore the structural evolution of galaxies into this bimodal distribution.
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(New) Fascism Contagion, Community, Myth
Fascism tends to be relegated to a dark chapter of European history, but what if new forms of fascism are currently returning to the forefront of the political scene?
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Sustainability & the Law lecture series
Sustainablity en the law lectures guest speakers legal social aspects
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Reconstruction Methods for Combined HAADF-STEM and EDS Tomography
The research in this thesis is focused on tomographic reconstruction based on two imaging modalities in electron microscopy.
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Sterile neutrinos in the early Universe
Promotor: A. Achúcarro, Co-promotor: A. Boyarsky
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Withstanding the cold: energy feedback in simulations of galaxies that include a cold interstellar medium
Understanding how galaxies form, interact, and evolve comes largely from comparing theory predictions with observational data. Numerical simulations of galaxies provide the most accurate approach to testing the theory, as they follow the non-linear evolution of gas and dark matter in great detail and…
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Caging ruthenium complexes with non-toxic ligands for photoactivated chemotherapy
The main goal of the research described in this thesis was the development of new photoactivated chemotherapy (PACT) ruthenium(II) complexes bearing a non-toxic photolabile ligand.
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Functional characterization and unraveling the Gene Regulatory Networks (GRNs) of HD-Zip transcription factor HB40 (and HB22) in Arabidopsis
In this Ph.D. thesis, we characterized two novel upstream regulators of JUB1, HB40, and HB22, in Arabidopsis thaliana. In Chapter 2, we described functions of HB40 in modulating growth and development via the regulation of JUB1 and GA inactivation genes GA2OXs.
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Simone van der Hof
Faculteit Rechtsgeleerdheid
s.van.der.hof@law.leidenuniv.nl | +31 71 527 8838
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Exploring the Universe
Astronomers want to understand the Universe, from the Big Bang to the present day, and what the future will hold. In Leiden they focus on two key questions: ‘How did stars and planets originate’ and ‘How were galaxies and black holes formed in the young Universe?’ A new generation of telescopes – just…
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Science & Cinema
In films kunnen de meest wonderlijke acties plaatsvinden. Maar zijn die acties in de 'echte' wereld ook mogelijk? En in hoeverre houden filmmakers ons voor de gek? Tijdens het Leiden International Film Festival komen film en wetenschap samen.
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Vertebrate automated screening technology (VAST)
How can you use robots and automatic recognition of microscopic images to test the effect of drugs exceptionally quickly?
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Playing dice with the Universe
The ultimate goal of cosmologists is to find a cosmological model able to explain the current observational data.
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Landscapes of Survival
The Archaeology and Epigraphy of Jordan’s North-Eastern Desert and Beyond
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Islamophobia and Radicalisation
A measured yet theoretically innovative exploration of how Islamophobia and radicalisation intersect and reinforce each other.
- Our story
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Lipid bilayers decorated with photosensitive ruthenium complexes
Promotor: E. Bouwman, Co-promotor: S. Bonnet
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Fruits of our labour: Work and organisation in the global food system
This is the first special issue of any organisation studies journal on food labour. Why is this a big deal? In this Introduction, we argue that the field should pay much more attention to the agri-food system and the work that goes into producing, distributing and consuming foodstuff. Food is such an…
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The formation of complex organic molecules in dense clouds-Sweet results from laboratory
Large areas of space are filled by molecular clouds that consist of gas and dust grains that are the remnants of dead stars. When these clouds start collapsing, the decreasing temperature and increasing density cause gas particles to start accreting onto dust grain surfaces.
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Focal-plane wavefront sensors for direct exoplanet imaging: Theory, simulations and on-sky demonstrations
One of the key limitations of the direct imaging of exoplanets at small angular separations are quasi-static speckles that originate from evolving non-common path aberrations (NCPA) to which the primary adaptive optics system is inherently blind. The main focus of this thesis is the development and…
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Astronomy (BSc)
During the bachelor’s programme Astronomy you will immerse yourself in questions about our universe. Questions such as: ‘what happens in a black hole?’ and ‘what is dark matter?’ In doing so you will learn to apply mathematics and physics to astronomical problems and you will work with computer simulations…
- Meet our staff
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Athens
Athens is universally known as a symbol of democracy, philosophy, and ancient Greek aesthetics. Some of the most famous classical monuments, including the Parthenon and the temple of Hephaestus, can be found here.
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About us
Leiden Observatory is the astronomical institute of the Faculty of Science of Leiden University.
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Dancing with giants: dynamics of dwarf satellite galaxies
Dwarf satellite galaxies in the Milky Way perform different dances than researchers initially expected. Marius Cautun from Durham University received a Marie Curie grant to unravel the mysteries of this orbital dance. October 1st 2018 he will start his research at the Leiden Observatory.
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Johan van Meurs Een studie over een pionierend orgeladviseur
In specialist organ literature a negative verdict is given on organs and organ specialists from the 1930’s. Did the same verdict apply to Johan van Meurs’ (1903-1986) work? Which role does Van Meurs’ collection of organ specifications play in the historical research on the organ?
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Leiden discoveries
From the Big Bang to superconductivity. Many ground-breaking discoveries have been made in Leiden University’s long history.