The Low Frequency Array enables studies of low-frequency carbon radio recombination lines with unprecedented sensitivity, spectral and spatial resolution.

Promotores: F.H. van Lunteren, F.P. Israel

This thesis explores the theoretical and observational properties of distant massive galaxies that harbour active black holes in their centres and shine brightly at radio wavelengths.

This thesis focuses on the study of transient and variable radio sources in the universe.

Promotor: H.J.A. Röttgering, Co-promotor: G.K. Miley

A century ago, it was unclear whether the stars in the sky were clustered in groups, or widely spread in the universe.

Promotor: Prof.dr. A.G.G.M. Tielens, Co-Promotor: J.B.R. Oonk

PhD Defence

It has now been well established that shocks and turbulent motions in the intra-cluster medium (ICM) generated through cluster mergers can produce large-scale synchrotron emission.

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

Physics and Engineering Approaches to Biomedicine and Pharmacology

Promotor: Prof.dr. H. J. A. Röttgering, Co-Promotor: Dr. M. Haverkorn

Current research at the Skin Barrier and Vaccination group.

Promotor: Prof.dr. F.S. de Boer, Co-promotor: D. Clarke

Promotor: H.J.A. Rottgering, Co-Promotor: R.J. van Weeren

After almost twenty years the record for the most distant radio galaxy has been broken. A team of astronomers led by Leiden PhD candidate Aayush Saxena has discovered a radio galaxy from the time when the universe was just one billion years old. The galaxy is at a distance of 12 billion light years…

The success of Dutch radio astronomy in the last century was largely due to Leiden astronomer Jan Hendrik Oort. He made astute use of circumstances in the post-war period. Historian Astrid Elbers' research focuses on this golden period.

Ineke van der Ham gives a radio interview at Radio 1.

Promotor: J.S. Kaastra Co-promotor: E. Constantini

Source: Biosens Bioelectron, Volume 74, pp. 233-42 (2015)

Description of Triple bottom line approach for risk-benefit analysis of genetically modified crops.

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The Dutch atlas with pesticides concentrations in surface waters have been overhauled. This new, free accessible, website is in line with the European Framework Directive on Water (In Dutch: KRW).

The LOFAR radio telescope produces petabytes of data every year. Radio Astronomers use complex multi-step pipelines to process this data and produce scientific images.

PhD Defence

Vast, often populated, areas in dryland ecosystems face the dangers of desertification.

This article on private active cyber defense by Dennis Broeders is part of a special issue of the Journal of Cybersecurity, based on a selection of contributions taken from the 2019 Conference on Cyber Norms organized by The Hague Program for Cyber Norms.

The parliamentary elections in the Netherlands, scheduled for March 2017, are likely to result in a fragmented parliament and a complicated coalition formation process, according to Dutch political scientist Hans Vollaard (Leiden University).

The publication in Nature Ecology & Evolution about the so-called Siberian unicorns took centre stage in a Dutch radio interview.

On 25 April 2016, Suliman Ibrahim, Senior Researcher at the VVI, was a guest expert on the weekly radio program: 'Huna Libya', a joint initiative by the Libyan al-Wasat Radio and Radio Netherlands Worldwide (RNW).

BNR Radio has broadcast an item on the physics formulas that are painted on walls across the Leiden historic city center. The wall formulas are initiated by Sense Jan van der Molen and Ivo van Vulpen.

In this thesis, we use low-frequency and high-frequency radio observations to address the following questions regarding quasars: is the radio loud/quiet quasar dichotomy real?

Physicist Joost Frenken was interviewed on the radio show 'Langs de Lijn en Omstreken' (Radio 1) about the recent discovery of superconductive graphene. The one-atom-thick material was already known for its strength, flexibility, lightweight and good conductivity.

On Tuesday June 14th, Dr. Armin Cuyvers of Leiden Law School discussed the legal consequences of a possible Brexit in the radio program Juridische Zaken (Legal Matters) of Business News Radio (BNR).

Anthropologist Bart Barendregt is participating in a new Indonesian study program that focuses entirely on the Indonesian digital society. The Radio 1 NPO program Focus interviewed Barendregt 'live' from Java about his research on social media, Islam and boy bands.

Joris Larik was interviewed by BBC World Service radio on the state of Brexit negotiations, the Irish border issue and ongoing Dutch preparation.

In Indonesië zijn studenten massaal in opstand gekomen tegen de regering, die vlak voordat er straks een nieuw parlement aantreedt, nog snel een aantal nieuwe wetten wil doorvoeren.

Somali archaeology in Somaliland takes centre stage in a BBC World Service radio programme and a China Global Television Networks (CGTN) programme, both presented by archaeologist Sada Mire.

The recent trade dispute between the U.S. and China has renewed the attention for the dependency of the U.S. and many other developed countries on the imports of critical materials. Recently this has led to an initiative by the U.S. government to team up with resource rich countries like Australia and…

Tanja Masson-Zwaan, an assistant professor at the Institute of Air and Space Law, spoke on Friday 14 April about space mining on BBC Radio.

On Friday morning, 8 June, Thijs Bosker, Associate Professor at Leiden University College, was interviewed by NPO Radio 1 on plastic pollution in Antartctica: ''Anually, an additional 4 - 12 billion kilos of plastic ends up in our ocean''.

Frank Takes, Assistant Professor at the Leiden Institute of Advanced Computer Science (LIACS), analyses the flow of funds in our economy using big data. With Jort Kelder, he discussed the value and importance of these data on NPO Radio 1.

Together with colleagues and students, Professor of conservation biology Geert de Snoo studies the decline of the lion population in a national park close to Kenia's capital city, Nairobi. He discusses how they try to protect the lions on radio Sleutelstad FM.

Marieke Liem is an Associate Professor at the Institute for Security and Global Affairs of Leiden University in The Hague. She was interviewed by local Leiden radio programme ‘Sleutelstad’ about her research into murder cases in the Netherlands.

Olivier Nieuwenhuijse, project leader of the project Focus Raqqa, was hosted by the NOS Radio 1 news broadcast on February 16, 2017.

Companies like Facebook and Google make billions of dollars by selling or using our personal data. The data could be used by many different entities for many different reasons: from universities for research, to brands for creating targeted ads. But rather than just giving their data away to these companies…

This thesis develops a method for direction dependent calibration of the ionosphere in radio interferometric data.

Bert Koenders, Professor Peace, Justice and Security at the Institute of Security and Global Affairs (ISGA) appeared live on the ‘BNR de Wereld’ special broadcast ‘De Grote Vredesshow’ (The Great Peace Show). The radio show was hosted live from Wijnhaven in collaboration with the Faculty Governance…

On 12 November Ingrid Leijten was a guest on Dutch NOS NPO Radio 1 programme Met het Oog op Morgen. She was asked to speak about the right to freedom of expression.