In the 16th and 17th centuries, many Northern-Netherlandish artists drew outdoors to train their hands and eyes, and to record landscapes and nature. In her inaugural lecture on 21 March 2022, Yvonne Bleyerveld, Professor by Special Appointment of Art on Paper and Parchment, draws our attention to a…

How did dynastic organization – that it, the employment of non-ruling family members and the development of dynastic traditions and concepts – influence state formation in both Catholic Europe and Muslim West-Asia?

On Friday, June 12th, the Europa Institute held its annual PhD Day.

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…

On 21 and 22 March 2019 the workshop 'Criptic Identities. Historicizing the identity formation of persons with disabilities across the globe' takes place at the Leiden Institute for History.

We investigate the buildup of galaxies from various vantage points. The first two chapters focus on the stellar content of galaxies, especially the distribution of stellar masses at birth and potential variations therein in various galactic environments.

Following the Big Bang, structure in the Universe started collapsing under the force of gravity. This resulted in the formation of the first stars, galaxies and clusters of galaxies.

Victoria Nyst's love for sign language was sparked when she accidentally ended up at a deaf school while studying African linguistics. The university lecturer has since been awarded a Vici grant to research the history of these languages.

Mathematical biologists from Leiden have developed a model that helps to explain how the spine and vertebrae, among other things, form during embryonic development. The same process, the other way around, plays a key role in cancer metastasis. Publication in iScience.

An international team of scientists, including Xander Tielens of Leiden Observatory, has used space telescope Hubble and the ALMA observatory to show that UV radiation from massive stars can prevent planets from forming. The researchers publish their findings on 1 March in the journal Science.

Scientists at Leiden University (Netherlands), Stuttgart University (Germany) and Ural Federal University (Russia) have successfully put forward a novel, computed, reaction mechanism that was experimentally tested and show that formaldehyde is formed at much earlier stages in the birthplaces of stars…

Promotor: Prof.dr. M. Franx, Co-Promotor: Rychard Bouwens

This thesis takes steps toward understanding the interaction between gas-phase and solid-state molecules in star- and planet-forming regions.

This thesis focuses on protoplanetary disks: flattened structures of gas and dust around young stars in which planets are expected to form and grow.

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.

This thesis focusses on the temperature structure in protoplanetary disks. The relation between structures seen in the dust and gas-phase molecules is investigated.

This thesis focus on the interaction between M dwarf stellar winds and Galactic cosmic rays and the possible effects on the habitability of exoplanets.

This book rovides an economic history of Portugal over the course of eight centuries, from 1143 through to 2010 and situates Portugal's economic growth within the context of European development. It also responds to fundamental questions about when, how and why the economy expanded, stagnated or co…

Promotor: C.U. Keller, Co-Promotor: F. Snik

Nienke van der Marel has been awarded the New Horizons Prize in physics for her pioneering research on planet formation. This prize is given to young, promising researchers in physics or mathematics. The astronomer and her colleagues found the first observational evidence for 'dust traps' in disks around…

Promotor: Prof.dr. J. Schaye, Co-promotor: Marcello Cacciato

The aim of this workshop is to open up the discussion of textual communities in Late Antiquity and the early Middle Ages, by offering a platform for PhD students from all over the world and from various disciplines to present their own research and discuss it with others. Deadline: April 23.

Promotor: F.P. Israel, Co-Promoter: R. Meijerink

Promotor: Prof.dr. H.V.J. Linnartz, Co-Promotores: S. Ioppolo, H.M. Cuppen

Organic molecules in interstellar space are important as they influence the structure of galaxies and star formations. Studying catalytic processes in space allows us to understand how molecular species are formed and chemically evolved in the interstellar medium and solar system objects.

Using the James Webb Space Telescope, an international team of researchers, including Leiden Professor of Molecular Astrophysics Ewine van Dishoeck, has discovered a palette of hydrocarbons in a planet-forming disc around a young, low-mass star. The results confirm that discs around very lightweight…

Bandura Witharana defended his thesis on 27 September 2018

The lipid matrix in the stratum corneum (SC), the upper layer of the skin, plays a critical role in the skin barrier. The matrix consists of ceramides (CERs), cholesterol (CHOL) and free fatty acids (FFAs).

This project explores the community of engineers in Sri Lanka and their role with regard to three domains of inquiry.

In this thesis, I study the formation of large-scale structure and the physics of particle acceleration at large scales (~Mpc).

Outflows are crucially important for the gas budget and evolution of luminous star-forming galaxies and AGNs, with observed mass outflow rates of the same order as the star formation rate. Greater star formation and black hole growth lead to more intense feedback and outflows, resulting in self-regulated…

The discovery of a planet far too large for its sun defies models about the formation of solar systems and planets. In a paper in Science, researchers, including Yamila Miguel of Leiden Observatory, report the discovery of a planet more than 13 times heavier than Earth orbiting the ultracool dwarf star…

OB associations are loose groups of young, massive stars. They constitute the last stage of the massive starformation process, and the context in which new stars are formed.

How do processes of coalition-formation influence patterns of decision-making in the European Union?

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.

One of the effects of climate change is the phenomenon of desertification, a process that occurs in semi-arid and arid areas and causes land degradation as well as vegetation loss. Due to the lack of resources, vegetation self-organizes to sustain itself by forming large-scale spatial patterns.

Even though more than 4000 extra-solar planets are known today, only a small fraction of these has been captured in an image. To better understand the planet formation mechanisms in solar-like environments we started the Young Suns Exoplanet Survey (YSES).

Promotores: Prof.dr. F.P. Israel, Prof.dr. P.P. van der Werf

The thesis explores how interstellar chemistry evolves as a function of time and changing physical architectures during the formation of stars.

In this thesis, we aimed to better understand the underlying mechanisms involved in TNBC progression and metastasis formation and discover new targets to reduce breast cancer related deaths.

Promotor: Prof.dr. J. Kuiper, Co-promotor: Saskia C.A. de Jager

Bacteria have the ability to alter their morphology in order to adapt to changing environments.

Join-in courses zijn MA-cursussen over middeleeuwse onderwerpen gegeven binnen vastgestelde MA-programma's van de zes deelnemende universiteiten van de Onderzoekschool. Op aanvraag zijn deze vakken toegankelijk voor studenten van andere (Nederlandse) universiteiten. De cursusbelasting en het aantal…

The physical landscape is the setting in which human activities take place. Landscape and site context during human occupation is one of the areas of concern for the geoarchaeologist. A detailed stratigraphical study -both on- and off-site- clearly enhances the interpretation of the archaeologists,…

At CWTS we have a long tradition of organising a weekly research seminar in which speakers present their research in the area of science studies and discuss their work with the audience. The seminar normally takes place on Friday, 15.00-16.15h (Central European Time). Presentations are given in Engl…

Rottgering

Political scientists Tom Louwerse, Simon Otjes & Cynthia van Vonno introduce the Dutch Parliamentary Behaviour Dataset, a record of parliamentary (voting) behaviour in the Dutch Tweede Kamer (Second Chamber, House of Representatives) since 1945.