167 search results for “complex netwerken” in the Public website
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Reactivity of cobalt(II)-dichalcogenide complexes: correlation between redox conversion and ligand-field strength
The redox-conversion reaction of metal-disulfide and metal-thiolate complexes are important, as they may shed light on electron-transfer reactions that often occur in Nature.
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of productive and futile encounters in an electron transfer protein complex
PNAS publication on protein encounter complexes
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Determining the structure of a chemotaxis kinase complex with receptor mimetics and cryo-EM
Can we determine the 3D structure of a chemotaxis core complex using single-particle reconstructions via cryo-EM?
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Hanshu Yu
Science
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The structure of the cytochrome P450cam-putidaredoxin complex determined by paramagnetic NMR spectroscopy and crystallography
Promotor: Prof.dr. M. Ubbink
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Inextricable ties between chemical complexity and dynamics of embedded protostellar regions
Promotor: E. F. van Dishoeck, Co-promotor: C. Walsh
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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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Archaeologist Jennifer Swerida investigates emergent social complexity in the Omani desert
In June 2024 the Faculty of Archaeology welcomed a new Assistant Professor. Dr Jennifer Swerida, originally from the United States, will strengthen the Faculty’s expertise on the archaeology of West Asia. ‘I explore human-environment relationships inside an ancient oasis and the surrounding land. Previous…
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Resolving a bioindicator diatom species complex using genomic approaches for freshwater biomonitoring
This thesis pioneers diatom molecular identification and quantification through genome-scale methods, with four key aims: (i) reviewing DNA/RNA sequencing methods in aquatic biomonitoring to highlight their strengths and limitations;
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PhD dissertation Jasper de Bie third in international competition
Jasper de Bie, who obtained his doctoral degree at the Institute of Criminal Law & Criminology and who is currently employed by the Ministry of Security and Justice, has been awarded an honourable third place in the international competition 'TRI Award for the Best Doctoral Dissertation on Terrorism…
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Mechano-transduction mediated by integrin-based adhesion complexes: integration of cytoskeleton and adhesion dynamics
In this thesis, we focus on novel proteins/mechanisms that regulate integrin-adhesion mediated mechano-transduction.
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Diederik Meijer
Faculteit Archeologie
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investigation of the photoprotection mechanism of Light Harvesting Complex II
Solar energy is used by photosynthetic organisms to drive energy required cellular processes. Is absorbed by two groups of pigments, located in the LHCs.
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Oxygen Reduction Catalyzed by a Copper(II) Tris(2‐pyridylmethyl)amine Complex through a Stepwise Mechanism
The mechanism of the electrochemical reduction of dioxygen by a mononuclear pyridylalkylamine copper complex was investigated (see picture). It was shown that in neutral aqueous solution dioxygen undergoes stepwise reduction, wherein hydrogen peroxide plays a key role. The rate constants determined…
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op complexiteit. Onderwijs voor het 'moeras' - Getting a grip on complexity. Education for the 'swamp'
How can pupils and students learn to get a grip on complex 'swamp situations'? Inaugural lecture in abbreviated form held by prof.dr.ir. Fred Janssen on the acceptance of the post of professor of science education at Leiden University on 19 June 2017.
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Complexity Models to Prevent Financial Crashes
The financial system needs complexity theory to predict economic crises like the 2008 meltdown. An international team of scientists, including Leiden physicist Diego Garlaschelli, state this in a paper published in Science on February 19th.
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Policy Note Insecurity in Burkina Faso – beyond conflict minerals: The complex links between artisanal gold mining and violence
Policy Note Insecurity in Burkina Faso – beyond conflict minerals: The complex links between artisanal gold mining and violence
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Disentangling a complex genus: systematics, biogeography and bioactivity of the genus Phyllanthus L. and related genera of tribe Phyllantheae
The largest genus within the Phyllanthaceae family is a group called Phyllanthus L. Recent studies have shown, that Phyllanthus is paraphyletic with the genera Glochidion, Breynia and Synostemon nested within it.
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The Archaeology of Syria – From Complex Hunter-Gatherers to Early Urban Societies (ca. 16,000 -300 BC)
This book is the first comprehensive presentation of the archaeology of Syria from the end of the Paleolithic period to 300 BC.
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Studium Generale series on complex networks kicked off
‘It has never been so easy to set up a Studium Generale series.’ With these words Tilman Grünewald thanked speaker Frank den Hollander, who kicked off the Studium Generale series on complex networks on Monday 20 February.
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Complex Organic Molecules Discovered in Infant Star System
For the first time, astronomers have detected the presence of complex organic molecules, the building blocks of life, in a protoplanetary disc surrounding a young star. The discovery reaffirms that the conditions that spawned the Earth and Sun are not unique in the Universe. The results are published…
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Population size fails to explain the evolution of complex culture
The logic seems inescapable indeed. The bigger the population, the higher the probability it contains an Einstein. Hence, bigger populations are more likely to develop complex culture.
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creative thinking and experimenting in the performance practice of complex music from 1962-today
The thesis wishes to examine the pathways of thought underlying the creative act of music making and the performance practice of complex music from the late twentieth and early twenty-first century.
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Common frame for analyzing complex systems in Physics and Economics
Scientists often need to make sense of complex systems without knowing the important parameters or even without access to all the information. A collaboration of network theorists, including Diego Garlaschelli (IMT Lucca/Leiden), has now published a review article in the inaugural issue of Nature Reviews…
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Frank Takes
Science
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Akrati Saxena
Science
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Joram van Ketel
Faculteit Rechtsgeleerdheid
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Sebastian Fajardo Bernal
Science
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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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Exploration on and of Networks
This dissertation consists of two parts, with the common theme
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Constructing elliptic curves of prescribed order
Promotor: Peter Stevenhagen
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ILS Seed Money
Twelve researchers of our Law School have been awarded an ILS seed money grant. This grant enables researchers to create space for preparing a grant proposal for NWO, ERC or otherwise.
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Tiny clumps recycle themselves into complex structures
Manufacturers produce high-end technology mostly top-down with large machinery, but small particles are able to build structures by themselves from the bottom up. A major challenge is that these particles easily clump together. Leiden physicist Daniela Kraft has developed a method to use this phenomenon…
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Short Update on the Wijnhaven Complex
The building is far from finished, but the former ministry of Internal Affairs is looking more and more like the Academic building for the locations of the University of Leiden in the Hague that it has to become. This week I got a tour behind the scenes of the gigantic project, where I was able to see…
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Pre-Neanderthalers could handle complex techniques
An international team of researchers including Leiden archaeologists has produced convincing evidence that 300,000 years ago pre-Neanderthal people had a high level of cognitive complexity. New insights into early human capabilities and behaviour.
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Isogeny graphs, modular polynomials, and applications
This thesis has three main parts. The first part gives an algorithm to compute Hilbert modular polynomials for ordinary abelian varieties with maximal real multiplication. Hilbert modular polynomials of a given level b give a way of finding all of the abelian varieties that are b-isogeneous to any given…
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Complexity and Network Science at the Leiden Networks Day
The first successful Leiden Networks day took place on September 23, 2016. Six world-renowned speakers (see photo) in the field of complexity and network science provided their view on the field.
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Interest: a complex concept in education
It's much easier to learn something if you're interested in it. But students' interests are often diverse and wide-ranging, says Sanne Akkerman, Professor of Educational Science. How do you cater for this in your teaching? Inaugural lecture 6 October.
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Leiden Complex Networks Network day on 23 September
On Friday 23 September 2016 the Leiden Complex Networks Network day, the LCN2 day, will take place in Leiden.
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Wijnhaven complex: a sneak peak in the future
From a ruinous building site to a lively university building: that is the drastic metamorphosis that the Wijnhaven complex is going through at this moment. The pictures below already show impressions of the end result.
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Work starts on Kolffpad student complex in Leiden
Work started today on the Kolffpad student complex, with 289 flats for students from Leiden University. Stichtnig DUWO will own the building and the University owns the site at the Bio Science Park. The building should be complete by mid-2023.
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Garnet Akeyr
Science
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Unravelling the complexity of HIV/AIDS
Dr. Josien de Klerk, Associate professor in Global Public Health at Leiden University College The Hague recently published some of her work on HIV/AIDS. In collaboration with a team of interdisciplinary researchers from the Amsterdam Institute for Global Health and Development she came to the conclusion…
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What do complex molecules tell us about star formation?
How do you progress from an immense gas cloud somewhere in the universe to a star with planets? Research by Astronomy PhD student Martijn van Gelder sheds more light on the earliest phases of this process. He will receive his doctorate on November 24th.
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Invertebrates on the edge
What invertebrates live in the fields and edges? Do the populations change with landscape complexity?
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Inverse Jacobian and related topics for certain superelliptic curves
To an algebraic curve C over the complex numbers one can associate a non-negative integer g, the genus, as a measure of its complexity.
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Public Leadership Challenge: finding new solutions to complex issues
Monday afternoon 11 January saw the first Public Leadership Challenge: a gathering of professionals, academics and students. The theme was a hotly debated topic: the refugee crisis. Among the participants looking for solutions to this complex issue were four students from the (International) Leiden…
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Frank Schaftenaar
Science
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Dark ice chemistry in interstellar clouds
This thesis is largely an experimental study on the formation of solid-state simple and complex organic molecules in the H2O-rich and CO-rich ice phases of dense interstellar clouds and dark cores.
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Shining Light on Interstellar Matter
Promotor: H.V.J. Linnartz