343 zoekresultaten voor “density measurements” in de Publieke website
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The End of our Third Decade (volume I)
Papers written on the occasion of the 30th anniversary of the Institute of Prehistory, Volume I.
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Research
Developing computational algorithms for structural biology -A high resolution, three dimensional view of a molecule provides detailed information that help elucidate its function: by knowing the exact arrangement of atoms in a molecule, we can understand disease, develop drugs to combat them and improve…
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Ecology of the Ethiopian wolf (Canis simensis Rüppell 1835) in a changing landscape: Human carnivore interactions in Afroalpine ecosystems of
Ethiopian wolves are endangered diurnal Afroalpine rodent hunters. I investigated the interaction between wolves, rodents and human land use in Borena Sayint National Park (BSNP), Abune Yosef and Aboi Gara in Ethiopia.
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Testing gravity on the largest scales with kids and friends
What are the 'dark' components of the universe?
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Modulation of the immune system for treatment of atherosclerosis
Cardiovascular diseases are the primary cause of death in the world with atherosclerosis as primary underlying cause.
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Towards chemically accurate simulation of molecule-surface reactions
This perspective addresses four challenges facing theorists whose aim is to make quantitatively accurate predictions for reactions of molecules on metal surfaces, and suggests ways of meeting these challenges, focusing on dissociative chemisorption reactions of H2, N2, and CH4.
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Magnetic Resonance Microimaging of Alzheimer's Disease
Alzheimer's disease (AD) is the most frequent neurodegenerative disorder and the primary cause of dementia. The neuropathological features of AD include the occurrence of senile plaques, neurofibrillary tangles, decreased synaptic density, and loss of neurons. An obstacle in the study and treatment…
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Monsters in the Deep: Using simulations to understand the excess baryonic mass in the centres of high-mass, early-type galaxies
This thesis aims to enhance our understanding of galaxies by testing theoretical models of galaxy formation against observations, particularly in the cases of extreme systems which have been found to have an excess of baryonic mass in their central regions, in the form of either supermassive black holes…
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The role of ceramide chain length distribution on the barrier properties of the skin lipid membranes
The skin barrier function is provided by the stratum corneum (SC). The lipids in the SC are composed of three lipid classes: ceramides (CERs), cholesterol (CHOL) and free fatty acids (FFAs) which form two crystalline lamellar structures. In the present study, we investigate the effect of CER chain length…
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Semi-empirical approach to the simulation of molecule-surface reaction dynamics
Catalysis is of extreme relevance in the production of everyday materials and plays a central role in many aspects of our life.
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The town, its waste and the cesspit
The rise and fall of the cesspit in an urban context
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The Infrared Spectrum of Massive Protostars
We have conducted a full spectral line survey of the 3-13 micron region of two massive protostars, AFGL 2591 and AFGL 2136, for the first time at high spectral resolution.
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Gjalt Huppes
Wiskunde en Natuurwetenschappen
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Computational approaches to dissociative chemisorption on metals: towards chemical accuracy
We review the state-of-the-art in the theory of dissociative chemisorption (DC) of small gas phase molecules on metal surfaces, which is important to modeling heterogeneous catalysis for practical reasons, and for achieving an understanding of the wealth of experimental information that exists for this…
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The Measure of Power and the Power of Measure
LUCIR Lecture: The Concept of Power in World Politics
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How to Measure Law?
Lezing
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Geometric approach to evolution problems in metric spaces
Promotor: S.M. Verduyn Lunel, Co-promotor: O.W. van Gaans
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Tom van der Reep
Wiskunde en Natuurwetenschappen
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Spatial patterns in landscape archaeology
This PhD project develops and applies a GIS procedure to use legacy survey data in settlement pattern analysis. As part of the research by the LERC project (NWO, Leiden University, KNIR), legacy data produced by surveys in central and southern Italy are examined in a comparative framework to investigate…
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Invited speakers
Speakers that have accepted to participate:
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Civitates Hispaniae: urbanization on the Iberian Peninsula during the Roman Empire
How do we explain the fact that certain areas had many large cities, while other areas were studded with large numbers of small towns and yet other areas had very few urban agglomerations of any kind?
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Fundamental Research in Energy & Sustainability
Twenty years from now, the world population is estimated to be around 9 billion people (now 7.8 billion). In combination with the improvements in living standards and the corresponding growth in consumption, this will result in an enormous increase in the demand for food, consumables, water and energy.…
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Technology and Methodology for Archaeological Practice
Practical applications for the reconstruction of the past
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Images of Galois representations
Promotores: S.J. Edixhoven, P.Parent
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Plant-microbe interactions
Which microorganisms live near and inside plant roots? How do they contribute to plant health? Can microorganisms be employed in plant protection?
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Fungal Chitosans from Fermentation Mycelia for Plant Biostimulants (FunChi)
Our focus is to optimize the fungal cell wall to both increase chitin production and chitin extractability.
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Guide to prospective students
If you are intrested instudying stochastics, the following information will help you to choose the right path
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Skin Lipids: Localization of Ceramide and Fatty Acid in the Unit Cell of the Long Periodicity Phase
The lipid matrix of the skin's stratum corneum plays a key role in the barrier function, which protects the body from desiccation. The lipids that make up this matrix consist of ceramides, cholesterol, and free fatty acids, and can form two coexisting crystalline lamellar phases: the long periodicity…
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Aging and Immunity
The Aging and Immunity group is led by Dr. Amanda Foks. In this group we aim to investigate how aged immune cells contribute to atherosclerosis and identify novel therapeutic targets and strategies to extend health span and inhibit cardiovascular disease.
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CWTS Course 'Measuring Science and Research Performance'
Cursus
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Russian Intelligence: Active Measures and Illegals
Lezing
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Research
Research in the POD-group addresses all features of random phenomena – modelling, structuring, analysis, control, optimisation – and covers both fundamental and applied aspects.
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Transition to renewable energy requires more space - but it will be much cleaner
To generate renewable energy takes more space than one might think. New research by environmental scientist Paul Behrens and master's student John van Zalk shows how much space is needed for nine specific types of energy. Biomass, hydro and wind, while vital, take up the most space. Natural gas and…
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CWTS course 'Measuring Science and Research Performance'
Cursus
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CWTS course 'Measuring Science and Research Performance'
Cursus
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Leiden physicists image lumpy superconductor
High-temperature superconductivity is one of the big mysteries in physics. Milan Allan’s research group used a Josephson Scanning Tunneling Microscope to image spatial variations of superconducting particles for the first time, and published about it in the journal Nature.
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Measurement and evaluation of hip fracture care
Promotie
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Mortality and other outcome measures in osteoarthritis
Promotie
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Tjerk Oosterkamp Lab (Microscopy and Quantum Mechanics at milliKelvin temperatures)
We explore the possibilities to combine magnetic resonance techniques with atomic force microscopy together in a single microscope: the MRI-AFM, also called Magnetic Resonance Force Microscopy (MRFM).
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Publications
Below is a chronological list of the most recent to oldest publication from the MultiGreen project.
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Addressing Global Environmental Concerns through Trade Measures
Promotie
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Measures and Matching for Number Systems
Promotie
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Relentlessly Plain
Understanding Late Neolithic Ceramic Containers from Upper Mesopotamia
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When semi-local DFT is accurate for dissociative chemisorption on a transition metal surface, and when it is not
Density functional theory (DFT) with so-called semi-local exchange has been remarkable accurate for some dissociative chemisorption reactions on metals, but it has notoriously failed for others. A team of researchers from the University of California at Irvine and the Leiden Institute of Chemistry have…
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Measurement Numeracy Education for Prospective Elementary School Teachers
Promotie
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How to measure aspects of fluency in speech, automatically
Lezing
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Teeth Tell Tales
A multi-disciplinary approach to past lifestyles and cultural practices
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Modeling energy conversion dynamics at interfaces
Chemical reactions go hand-in-hand with an energy exchange with the environment in which they take place. Surfaces offer a variety of energy dissipation channels, constituted by the nuclear and electronic degrees of freedom of the atoms at the interface. Aiming at an improved future harvesting of energy,…
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A new window on the Universe
Rottgering
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Rewriting Hellenism: André Chénier (1762-1794) and Hellenistic Poetry
The project focuses on an intriguing aspect of André Chénier’s poetry, which has not received much attention in scholarship: Chénier’s indebtedness – in the form of translation, adaptation, borrowing, reference – to Hellenistic poetry; it interprets the role of this indebtedness in his poetical and…