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

Promotores: Prof.dr. A.G.G.M. Tielens, Prof.dr. L.B.F.M. Waters (UvA), Prof.dr. C. Dominik (UvA)

My work focuses on a class of astronomical objects called protoplanetary disks.

The work presented in this thesis is based on ALMA surveys of protoplanetary disks in three star-forming regions: Lupus, OMC-2, and NGC 2024.

To study how planetary systems come into existence we study much younger systems still in formation.

This thesis examines the link between simple molecules and the underlying structure and chemistry within protoplanetary disks - the birthplaces of planets.

A large diversity of exoplanetary systems has been found, but it is still unclear what drives this diversity.

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

What is the origin of solar systems?

Kohei Suzuki, Assistant Professor at Institute of Public Administration, researched, together with two other authors, whether public managers with private sector experience have more core managerial values.

Our Dutch-taught Master of Public Sector Management equips you to tackle pressing societal challenges, like climate change and artificial intelligence. Prepare for a rewarding career as a public professional, understanding the crucial role of a proactive and reliable government in addressing these complex…

The Leiden LIS Sectoral Income Inequality Dataset, assembled by Chen Wang, Stefan Thewissen and Olaf van Vliet (Version 1.1, March 2014), contains information on multiple indicators of earnings inequality and employment within 9 sectors and 12 subsectors, drawing upon micro data from Luxembourg Income…

The economics department teaches the following four courses within the master Pubic sector Management. This is a dutch master.

In this article, Friso Selten and Bram Klievink explore how public organisations strategically manage the adoption of AI.

The Ministry of Education, Culture and Science, in consultation with the Netherlands Organization for Scientific Research (NWO), provides funding for the Netherlands National Law Sector Plan, part of the domain ‘Social Sciences and Humanities’.

In the discs of dust and gasses around young stars, mysterious structures occur. Together with professor Ewine van Dishoeck, PhD student Paolo Cazzoletti investigate how we can explain these forms, such as rings, spirals and holes. On 12 December, he will defend his thesis.

Previous studies have identified institutional, organizational, and individual factors that promote innovation in public organizations. Yet they have overlooked how the type of public administration—and the type of administrators—is associated with innovative attitudes.

Promotor: E. F. van Dishoeck, Co-promotor: C. Walsh

Planets are formed in disks of gas and dust around young stars.

Kohei Suzuki, assistant professor at Leiden University, together with Victor Lapuente, examined how male and female public managers show attitudinal differences toward innovation in the public sector.

The master's specialisation ICT in the Public Sector at Leiden University examines issues relevant in the public domain such as politico-administrative relations, European procurement and data-driven policy development. Students will learn how to apply Computer Science knowledge on a managerial leve…

In this article, James Shires and Tatiana Tropina, assistant professors at the Institute of Security and Global Affairs, map the relationship between gender equality and cybersecurity governance as a component of good security sector governance (SSG). Here, it highlights the way in which cybersecurity…

Discover the new MSc in Public Sector Economics at Leiden University, offered entirely in Dutch. This program prepares future policy economists by bridging economic theory, Dutch institutions, and real-world policy challenges. Starting September 2025 in The Hague, it focuses on key issues like inequality,…

Detecting planets during their formation stages is crucial for understanding the history and diversity of fully developed planetary systems like our own. However, observing young planets directly is challenging because they are often deeply embedded within their host protoplanetary discs, rich in gas…

Are you thinking about studying ICT in Business and the Public Sector? Learn more and watch the introduction video.

The new Master’s programme in Public Sector Economics (MSc Economics) prepares you to become the policy economist of the future. The programme enables you to bridge the gap between economic theories, scientific methods, the functioning of Dutch institutions and policy processes, as well as current societal…

Research using the ALMA telescope by scientists including Leiden's John Tobin and Steven Bos has produced the first images of the water snow line within a protoplanetary disc. Publication in Nature on 14 July.

This article examines how motivational signals in job advertisements relate to public employers’ recruitment success.

To address the fundamental questions of how life on Earth emerged and how common life may be in the Universe, it is crucial to know the chemical composition of the planet-forming material.

The book offers different theoretical perspectives to help examine the process of public sector reform. In addition it gives an overview of the major trends in the core areas of the functioning of the public sector.

The two-years master's programme ICT in Business and the Public Sector (last intake in February 2025) at Leiden University provides students with a deeper understanding on our thinking on physical, geographical and industry boundaries, on distance, speed and communication. The programme offers two specialisations:…

Are you thinking about studying Management van de Publieke Sector: Politiek, Beleid en Management? Learn more and watch thevideos. Please note that this programme is taught in Dutch.

Are you thinking about studying Management van de Publieke Sector: Bestuur en Advisering?Learn more and watch the videos. Please note that this programme is taught in Dutch.

Promotores: Prof.dr. E.F. van Dishoeck, Prof.dr. C.P. Dullemond

What are the various forms of inter-organizational collaboration in the public safety sector? How are different forms of inter-organizational collaborative arrangements related? What is the relationship between inter-organizational collaboration and innovation in the public safety sector?

This thesis discusses the physical and chemical processes than influence the composition of forming planets.

The formation of stars and planets happens over multiple scales, which can interact. In particular, planet formation happens in the dense, complex environment of star forming regions.

Promotores: Prof.dr. G.A. Persoon & Prof. dr. H.H. de Iongh

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

In this book, Sarah Giest, Assistant Professor at the Institute of Public Administration, provides insight into the collaborative and absorptive capacities needed to provide public support to local innovation through cluster organizations.

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

This thesis studied in depth the energy use and CO2 emissions of the industrial sector in China.

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?

Do e-waste workers display enhanced effects of adverse health effects due to informal e-waste processing in Nigeria? Is there a difference between the health outcomes of the exposed and the control groups? Are there difference in health effects within and between job groups (collectors, dismantlers,…

The financial sector is an appealing target for hackers. For that reason, lawmakers and regulators are going to great lengths to make the sector more resilient to cyber attacks. One recent measure was the introduction of the Digital Operational Resilience Act (DORA). This new EU regulation is extremely…

High-angular-resolution observations of the circumstellar material have uncovered numerous and very diverse substructures in protoplanetary discs, raising the question of whether they are caused by forming planets or other mechanisms.

The focus of this thesis is how stars like our Sun and planets like Jupiter, Saturn, and Earth are formed.