349 search results for “light pollution” in the Public website
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Protector against air pollution is vulnerable to air
Catalyst research aims to make gasoline less polluting. It turns out that during experiments it is actually necessary to protect catalysts from air itself. Publication in The Journal of Physical Chemistry C on August 26.
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Lasers, lenses and light curves: adaptive optics microscopy and peculiar transiting exoplanets
Promotores: Prof.dr. C.U. Keller, Prof.dr. H.C. Gerritsen
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Light Weighed: On the Statistics and Systematics of Weak Gravitational Lensing
In astronomy, the interpration of observations and measurements plays a crucial role: we rely purely and fundamentally on the information that reaches us as observers. And 80% of all matter in the universe is undetectable directly.
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Second international conference on microplastic pollution in the Mediterranean sea
Two years after the first conference, the Napels based Institute of Chemistry and Technology of Polymers, together with a consortium of organisations and research institutes, organised the second conference from 15 to 18 September in Capri, Italy.
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How to share responsibility for polluting the atmosphere?
In our globalised economy, goods and services are frequently produced abroad. Is it the producer or the consumer that should be held responsible for greenhouse gas emissions associated with production? Together with colleagues from Berlin, Hauke Ward of the Institute of Environmental Sciences (CML)…
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Thijs Bosker
Science
t.bosker@cml.leidenuniv.nl | +31 71 527 4924
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Light and nanoparticles against cancer
Leiden PhD student Xuequan Zhou has designed a new promising molecule that efficiently kills cancer cells, but does not harm healthy tissue. The trick: the drug is only active when irradiated with light. Zhou’s new compound does this extra efficiently by cleverly self-organising into nanoparticles.…
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Workshop ‘Science Based Rules on Plastic: Regulating Plastic Pollution’ at Lorentz Center
From 27 to 31 January, a workshop on the regulation of plastic pollution based on scientific evidence will be held at the Lorentz Center in Leiden.
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Assessment of museum environments in Jordan
This study seeks to identify suitable local environments conditions for the objects displayed at the Jordanian museums using the proper methods in order to contribute to the stabilization of these objects.
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Historical drivers at the regional and sectoral levels and projections in light of policy
This thesis studied in depth the energy use and CO2 emissions of the industrial sector in China.
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Berent Baris
Science
b.t.baris@cml.leidenuniv.nl | +31 71 527 2727
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Liselotte Rambonnet
Science
l.rambonnet@biology.leidenuniv.nl | +31 715272 5082
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Historical drivers at the regional and sectoral levels and projections in light of policy targets
Has the industrial sector in China effectively been decarbonizing in recent years, across different regions and subsectors, and is it plausible that it will reduce its CO2 emissions in conformity with national and internationally pledged emission goals?
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MIGRADROME: new study on the impact of vessel sound pollution on fish behaviour
Fishes rely heavily on sound to find their way during migration or dispersal. Many species are affected by noise pollution. Hans Slabbekoorn from the Institute of Biology Leiden received a HORIZON2020 grant of 500,000 euros to study the impact of sound conditions on movement decisions of fishes.
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Sound Investigation: Effects of noise on marine animals across trophic levels
Anthropogenic noise has been shown to affect marine animals in various ways, this may have fitness consequences at individual and population level. This thesis aims to increase insight into the quantification of sound-induced behavioural responses that are relevant to fitness, and into factors that…
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Revisiting past cyber operations in light of new cyber norms and interpretations of international law: inching towards lines in the sand?
This article traces the evolution of interpretations of international law and international cyber norms on responsible state behaviour in cyberspace by reassessing five major – and allegedly state-led – cyber operations: Stuxnet 2010; Belgacom 2013-2014, the Ukrainian power grid 2015, the US presidential…
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Long term dynamics of stochastic evolution equations
Promotor: S.M. Verduyn Lunel, Co-promotor: O. van Gaans
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Lights in a sea of darkness: constraining the nature and properties of dark matter using the stellar kinematics in the centres of ultra-faint
Dark matter is one of the biggest mysteries of the Universe. Its properties cannot be explained with the known laws of physics and elementary particles.
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Light on the quantum computer
Physicist Martin van Exter works with light at nanoscale, at the forefront of nanocomputer research. But as Director of Education he also has a vision for physics teaching. Inaugural lecture 18 November.
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Playing with light and shadow
Depictions of Rembrandt, Michelangelo and many other artists are given a new dimension in an exhibition in the hall of the Oude UB at Leiden University. The exhibition - 'Multiple Images' - opens officially on 15 February. Artist Rudi Struik has given the slides of Leiden art historian Henri van de…
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Flashing lights protect livestock from lions
Farmers on the outskirts of Nairobi National Park protect their livestock using flashing lights on top of the animal enclosures. This system keeps lions away at night. Leiden research has shown that the method is both simple and effective. Publication in PLOS ONE.
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Telescopes
The Old Observatory houses four historical telescopes. On this page you can learn more about them.
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Opportunity and Problem in Context (OPiC). A framework for environmental management in developing countries
Promotor: W.T. de Groot
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The noisy underwater world: the effect of sound on behaviour of captive zebrafish
Promotor: Carel J. ten Cate, Co-Promotor: Hans W. Slabbekoorn
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Astronomers finally measure polarised light from exoplanet
An international team led by Leiden astronomers has, after years of searching and defying the boundaries of a telescope, for the first time directly captured polarised light from an exoplanet. From this light they can deduct that a disk of dust and gas orbits the exoplanet. In this disk moons are possibly…
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Light manipulated with large artificial atom
Physicists have manipulated light with large artificial atoms, so-called quantum dots. Before, this has only been done so well with actual atoms. It is an important step towards light-based quantum technology. Publication on August 30th in Nature Communications.
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Bredero in a new light
Bredero (1585-1618) was known for his farces and comedies, but he also wrote one tragedy. According to Olga van Marion and Tim Vergeer, the play's main protagonists Rodd’rick and Alphonsus were not competing for the love of a lady, but were in love with one another.
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Weighing heavenly bodies based on bending light
Many astronomers suspect that most of the matter in the universe is invisible. So how can you weigh dark matter if you can't actually see it? Professor Henk Hoekstra is looking for a solution. Inaugural lecture 25 June.
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Spin-off from astronomy: measuring water pollution with your mobile
Leiden astronomers and ecologists are developing an instrument that lets people measure the quality of surface water with a smartphone.This international citizen science project, MONOCLE, is a collaboration between scientists and local people in Tanzania, Brazil and four European countries.
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Green light for Leiden supercomputer
From simulations of galaxies to analyses of MRI scans: scientific research needs more and more computing power. Leiden University is planning to set up a completely new facility for high-performance computing. The green light was given officially on 20 June.
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New light on dark matter
An international team of astronomers has found an unexpected link between dark matter and visible stars in stellar systems. This discovery may even cause us to reconsider our understanding of gravity. They published on their discovery in 'Nature' on 1 October.
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‘All of Leiden will join in with the Seeing Stars experiment’
What will happen if the lights in a large part of the city are switched off? How many stars can you see without all that light pollution? This is what researchers, artists and the residents of Leiden are going to investigate during Seeing Stars Leiden on 25 September. ‘Leiden is the ideal place for…
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Wil Tamis
Science
tamis@cml.leidenuniv.nl | +31 71 527 2727
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Celebrating the International Day of Light in the Old Observatory
On 16 May the first International Day of Light was celebrated all around the globe. Initiated by UNESCO, organisations in 87 different countries set up a total of more than 600 events to embrace the vital role of light and related technologies in science. In the Old Observatory in Leiden visitors could…
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Celebrating the International Day of Light in the Old Observatory
On 16 May the first International Day of Light was celebrated all around the globe. Initiated by UNESCO, organisations in 87 different countries set up a total of more than 600 events to embrace the vital role of light and related technologies in science. In the Old Observatory in Leiden visitors could…
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Ultra-thin material absorbs all the light
It appears to be a paradox: ultra-thin material that absorbs all the incident light. Nonetheless, it does exist. Two Leiden researchers report on their research in ‘Applied Physics Letters’. The article is among the Top 20 of the most downloaded articles of this reputable journal in May.
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Capturing polarised light in the search for alien plants
A new way to decipher the light from distant worlds could give us unmistakable evidence of extraterrestrial photosynthesis, and maybe alien plants, finds astronomy author Colin Stuart in the New Scientist. In his article, he describes the work of the group led by Leiden astronomer Rob van Holstein.…
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Anjali Pandit
Science
a.pandit@chem.leidenuniv.nl | +31 71 527 4198
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Oana Georgiana Rus-Oswald
Faculteit der Sociale Wetenschappen
o.g.rus@fsw.leidenuniv.nl | +31 71 527 2727
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A celebration of light, peace and the night sky
The International Day of Light (IDL) celebrates the ubiquitous role light has in our lives. From Argentina to South Africa, Japan and Pakistan, several events have taken place across all continents on May 16. The date is a token for people around the globe to connect with the importance of light in…
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Physicists image individual molecules by watching them absorb light
Molecules are extremely hard to see in visible light, especially without using fluorescence. Leiden physicists have now made their optical technique sensitive enough to image the molecules of their interest in all sizes. Publication in Nanoletters.
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Einstein’s light dances and spins in Leiden
The documentary Einstein’s Light by director Nickolas Barris shows in a dazzling manner what scientific breakthroughs resulted from the special friendship between Albert Einstein and the Leiden physicist Hendrik Antoon Lorentz. The documentary premiered at the Leiden International Film Festival on 2…
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Light particles lined up one after the other
In Leiden, light particles march into Wolfgang Löffler’s experiments one by one. His research focuses on acquiring the fundamental knowledge needed to develop quantum computers and networks.
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Shedding light on the dark side of the universe
It must be there. We just cannot see it: mysterious dark matter and dark energy in the universe. Henk Hoekstra is one of the many cosmologists who would love to know what exactly these substances consist of. He has received a European research grant of 1.3 euro million to find out.
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New light on innate plant immunity
Plants are able to resist a pathogen’s attack by a dual innate immune system. The relationship between the two pathways was not clear, but it turns out that they mutually potentiate each other, as assistant professor Pingtao Ding (Institute of Biology Leiden) and colleagues (The Sainsbury Laboratory,…
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Scattering and absorption in 2D optics
Scattering of light in the presence of nano-structured materials, i.e. with features in the order of the wavelength of the light or smaller, reveals details of how light interacts with matter at the nanoscale.
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SKY HIGH: Vertical farming a revolution in plant production
As a new vision on food production, the feasibility study on LED light to grow crops with the biological- and chemical evaluation of final products.
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Testing of a malaria vaccine gets the green light
Researchers at Leiden University Medical Center (LUMC) and Radboud university medical center have been given the green light to deliberately infect volunteers with malaria in order to test a highly promising vaccine on them.
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How do you make citizen science successful?
Mapping out the problem of plastic pollution requires a lot of data over a large area. That's why scientists are increasingly turning to volunteers for help, also known as citizen science. But what are the challenges for a researcher when he or she involves the public in research in this way? Four Leiden…