Get on your bike… or your tandem, unicycle, electric bike, tricycle, penny-farthing, rickshaw or road bike! We’re going on a bike trip!

This thesis discusses several questions regarding the double ramification cycle as a Chow class on the moduli space of stable n-pointed genus g curves using tools from so-called logarithmic geometry.

How effective is eye movement desensitization and reprocessing therapy in targeting epilepsy-related anxiety?

Promotores: Prof.dr.G.R. de Snoo and Dr. R. Heijungs

Researchers at LED3 are working together with biopharmaceutical company Galapagos to develop software for use in early drug discovery (funded by NWO). This software is able to design molecules with several simultaneously optimized characteristics and will also take prediction reliability into consideration…

HiQ-LCA aims to deliver an independent, high-quality Life Cycle Assessment database for use in industrial battery LCA case studies

To contribute to the body of knowledge aiming at a better coverage of ecosystem service assessment in LCA studies, this thesis dives into the challenges of incorporating existing ecosystem service methods within the impact assessment phase of the conventional LCA framework.

The upscaling of Life Cycle Assessment (LCA) data is recognized as one of the main challenges in the ex-ante LCA of emerging technologies. This challenge arises since industrial-scale system specifications for these technologies are unknown and industrial data is lacking.

Promotores: Prof.dr. G.R. de Snoo & Dr. R. Heijungs

The development of new environmentally sound technologies is seen as a key route towards achieving sustainability.

LCA has become an important method to study environmental impacts of human activities. Still, there are several methodological issues in LCA that can adversely affect the results reliability.

A difficulty of studies on chemical kinetics are the reaction time scales and detection of their intermediates.

A study of the technology, form, function, and use of pottery from the settlements Uitgeest-Groot Dorregeest and Schagen-Muggenburg 1, Roman Period, North-Holland, the Netherlands

Leiden University, Department of Economics

Promotor: Prof.dr. G.R. de Snoo

In this PhD study, I aim to deepen our understanding of the influence of major mycorrhizal types, namely arbuscular mycorrhizae (AM) and ectomycorrhizae (EM), on the global soil carbon cycle and their potential distribution changes under future environmental shifts.

The main research question of this thesis was: Can nitrogen cycling on dairy farms on peat soil in the Dutch Green Heart area be improved by adapting management to the nitrogen supply from soil and by using other grassland species and crops without affecting milk production?

A bike tour is probably not the first thing that comes to mind when thinking about inequality. However, students of a Master Honours Challenge came up with this and other solutions to tackle local inequalities. Creativity and empathy turned out to be useful ingredients.

Leiden University is 444 years old, and to celebrate 220 cyclists took to the saddle on 11 May and followed the new 44.4 km route around Leiden, The Hague and the surrounding area.

The NestWacht project is a Citizen Science collaboration between Science Centre Delft, Naturalis, and the Citizen Science Lab of Leiden University to engage individuals, families and primary schools in Leiden and Delft in scientific research on the impact of climate change on nature in their city, and…

Mycorrhizas are symbiotic associations between soil fungi and most plant species.

Although the weather in the Netherlands will always be unpredictable, June might be the month to say with certainty that the temperatures will be pleasing enough for a ride on your bicycle. Aside from the benefits for your (mental) health, you will also make a positive impact on the environment. Start…

How can an effective ‘Safe and Circular by Design’ method be developed for practical application in a designer’s context, particularly for the initial stages of product design, incorporating Safe-by-design strategies, LCA/LCT, risk assessment and ethics?

On 1 June 2022, Bruno Braak defended his thesis entitled 'Overcoming ruptures: Zande identity, governance, and tradition during cycles of war and displacement in South Sudan and Uganda (2014-2019).' The doctoral research was supervised by Prof.dr. J.M. Otto, Dr.ir. C.I.M. Jacobs, and Dr. C. Leonardi…

The research aims at achieving a European consensus on a harmonized LCA approach/framework to be applied in E-mobility sector. The research will focus on needs and gaps in current LCA practices in E-mobility and try to provide solutions for them based on the rich knowledge and experience represented…

The authors provide an approach for eliciting population’s preferences in order to calculate weights for use in the optional weighting step in Life Cycle Assessment.

The car we buy is made out of thousands of components, which are produced using different types of materials. These materials need to be sourced from different places, sent to production facilities and assembled. Once the car is dismissed, the components need to be taken care of by either reusing, recycling…

Development & demonstration of low environmental impact innovation and optimization practices in pharma production.

‘In Hong Kong, the elderly found our popular nature routes boring, so they now cycle our action-packed routes through New York.’ What once started as an assignment for the Master Programme Media Technology, has grown into the international market leader in the field of virtual reality exercises for…

Meet Thomas King, alumnus BA International Studies: ‘I’m currently living in London which is a really amazing experience! I’m a British citizen and I moved to the Netherlands to study BA International Studies back in 2017. I had the best three years ever living in The Hague and studying at Leiden.’

What mismatch of socioeconomic and environmental values is preventing Circular Collaboration in Dutch housing renovations?

Just like the professional riders from the Jumbo-Visma team, amateur cyclists will soon be able to analyse and improve their performance. Leiden data scientists working with the cycling team are making their smart data model available so that every serious cyclist can keep track of their fitness.

The life cycle of comets near the star Beta Pictoris is similar to that of comets in our own solar system. This is the conclusion of a team of astronomers from the Netherlands, France and Brazil. It seems that, just like in our own solar system, there are fewer comets as the star gets older. The researchers,…

There is a need for alternative methods to replace, reduce and refine (3R) animal experimentation. Combining experimental data from high-throughput in vitro studies with in silico modeling is a promising approach to unravel the effect of chemicals on living cells and to gain a better understanding of…

Advances in the field of high-performance Nd-Fe-B permanent magnets, by re-engineering their microstructure to make them more powerful while reducing rare earth content.

The transition to electric vehicles (EVs) reduces vehicle emissions to combat climate change. EVs raise concerns regarding the production of lithium-ion batteries and related emissions; while batteries can also provide energy storage services for the electricity system.

With a headwind of 80 kilometres per hour, pouring rain and freezing temperatures, Jurjun van der Velde cycles down the Oosterscheldekering. On his traditional Dutch bike with back pedal brake, he is the second PhD student from the faculty to win the title.

In May and June of 2021, Bachelor 1 and 2 students of the Faculty of Archaeology joined in the excavation at Oss. After the fieldwork itself, a second post-excavations week started in Leiden where each of them participated in small groups conducting archaeological find processing and working on creative…