It is a common technique in global optimization with expensive black-box functions to learn a surrogate-model of the response function from past evaluations and use it to decide on the location of future evaluations.

Historiography of science is in its current self-image a non-evaluative discipline. Its main goal is to understand past processes of knowledge formation on their own terms. In the last few decades this approach has greatly improved our understanding of the phenomenon of science. Yet, something strange…

Microneedle-based vaccination has several advantages over vaccination by using conventional hypodermic needles.

Promotores: Arjen Doelman, Jens Rademacher, Max Rietkerk

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

Poly(lactic-co-glycolic acid) (PLGA) particles have been extensively studied as biodegradable delivery system to improve the potency and safety of protein-based vaccines. In this study we analyzed how the size of PLGA particles, and hence their ability to be engulfed by dendritic cells (DC), affects…

This project, under the supervision of Prof. Dr. Hans van der Plicht, comprises several studies aimed at the use of isotopes occurring naturally in organic material as tracers for both the climate change and its cultural impact at about 6200 BC. The research will be carried out by the co-applicant at…

What does site patterning reveal about the social landscape dynamics across the historical divide?

Promotor: Prof.dr. A. P. IJzerman, Co-Promotor: Dr. L.H. Heitman

On Thursday 9 november, Reijer Passchier defended his dissertation 'Informal constitutional change'. His supervisor is Professor Wim Voermans.

Take a view on the slides of the presentation and read what the event of Climate Change & Health was about.

The world we live in is changing in many aspects at an ever-increasing speed. And it will continue to do so. How do we anticipate these changes, such as the increase in atmospheric CO2, the extinction of species and industrialisation?

To what extent and how do identity processes influence health behavior?

The Indonesian Experience after the Fall of Suharto

Explaining cutback management strategies in public sector organisations: change leadership in times of crisis. How does the publicness of organisations affect the choice and implementation of cutback management strategies?

This part entails the analysis of an extensive sample of animal bone (c. 30,000 pieces) retrieved from well-defined archaeological contexts of the early period at Tell Sabi Abyad, c. 6800-6200 BC. It comprises aspects of taphonomy, ageing and osteometry, the reconstruction of the local spectrum of domestic…

On the 13th of October, Cesko Voeten successfully defended a doctoral thesis and graduated. The Leiden University Centre for Linguistics congratulates Cesko on this achievement!

This project aims to identify, quantify and map the exposure of Dutch national monuments to four climate change effects: flooding, waterlogging, drought and heat.

Promotor: Prof.dr. M.K. Richardson, Co-Promotor: F. Witte

As every academic year, the leadership team of the Young Academy Leiden is changing. As of September 2021, Dr. Annemarie Samuels (Associate Professor, Social and Behavioural Sciences), former Vice-Chair, will be the Chair of YAL. And Dr. Sarah Giest (Assistant Professor, Governance and Global Affairs)…

Evaluating the environmental consequences of diet changes in the European Union.

What is the optimal design of sandy solutions for sustainable climate change adaption, from an ecological, biophysical and societal point of view?

Promotor: Prof.dr. K.J. Batenburg

How does the vision of problems and solutions from

Didactics

Which traits did change due to the invasion process of plants and how do these traits contribute to the invasiveness of such species. What is the role of carbohydrate accumulation? What is the function of carbohydrate accumulation in plants? Is genetic variation depleted in invasive species under se…

Description of 20th century changes in the Dutch flora: Description and interpretation (1999 - 2005)

This thesis describes the use of the evolutionary approach in the study of language change, aiming to provide a better insight in the mechanisms that play a role in language change and to validate this approach in the field of language change.

Researchers from the Institute of Public Administration study the mechanism of lobbying and influencing political parties and the behaviour of these parties to see how solutions are found to problems. This enables them to reach conclusions as to how best to effect changes in political focus and poli…

Sarah Giest, Assistant Professor at Leiden University, and Ishani Mukherjee researched the topic of 'Behavioural Insights Teams (BITs) and Policy Change: An Exploration of Impact, Location, and Temporality of Policy Advice'.

This study explores the role of linguistic data in the reconstruction of Dolgan (pre)history by analyzing contact-induced changes and using them to infer information about the nature of the contact settings in which they occurred.

This part of the research programme is carried out by Prof. Dr. René Cappers. It focusses on the continuities and changes in the use of plants at Late Neolithic Tell Sabi Abyad, as well as on their implications as proxy evidence for the climate change c. 6200 BC. Parallel to the design of the other…

Public organizations have been confronted with severe budget cuts as a result of the most recent crisis. Public managers are tasked with the implementation of cutbacks. Using different case studies within Dutch ministries and the prison sector, we assess public managers’ change leadership in times of…

New Approaches to Understanding the Eastern Mediterranean during Byzantine and Ottoman Times

Can the (industrial) herbal extraction process be mathematically described and can this model be used to optimize the extraction in terms of quality and economical parameters?

An examination of academic organization at the forefront of the biotechnology revolution

This edited volume evaluates the concept of global order, with a particular emphasis on the role of regional organisations within global governance institutions such as the United Nations. Several researchers at the Institute of Security and Global Affairs (ISGA) have contributed to this volume in the…

How do crises produce changes in specific European Union foreign policy areas, and how should we conceptualise these policy changes?

This project investigates the influence that Arabic (esp. dialectal Arabic) has had on the Berber languages of Northern Africa.

On the first day at a new job, you have sweaty palms, nerves race through your system, and you feel insecure. Now, a couple of months later these feelings have left. You know what to do in your new role and have become part of the organization. The process leading to this result is called organizational…

This dissertation investigates A'-dependencies in Standard German, Zurich German and Dutch where the dislocated constituent is indirectly, i.e. not transformationally, related to the position where it is interpreted. The analysis is carried out within the Principles & Parameters framework.

The main goal of this project is to answer the question: how did Dutch acquire its own, distinctive linguistic characteristics?

In Shimmering Images, Eliza Steinbock traces how cinema offers alternative ways to understand gender transitions through a specific aesthetics of change.