Stars like the sun are born in large molecular clouds existing from gas and dust. During the formation process, the chemical composition of the material can be altered drastically by the changing physical conditions.

Where does the urge to collect come from? What are the explicit or underlying reasons for gathering large amount of objects?

Statistical considerations guide the design and implementation of the experiments that scientists perform. For instance, in a clinical trial about a the efficacy of a treatment, its effect in a certain minimum amount of patients has to be observed in order to make confident assertions about the efficacy…

Announcement of the publication of Vamping the Stage: Female Voices of Asian Modernities, the first book-length study of women, modernity, and popular music in Asia (University of Hawai'i Press, 2017).

75 jaar na Hiroshima en Nagasaki In samenwerking met Japanmuseum SieboldHuis, naar aanleiding van de tentoonstelling aldaar.

Deze week werd bekend dat een oud-FBI-rechercheur Vince Pankoke mogelijk had ontdekt wie Anne Frank heeft verraden aan de Duitse politie. Het zou gaan om notaris Arnold van den Bergh, lid van de Joodse raad, die adressen met onderduikadressen zou hebben doorgespeeld. Historicus Bart van der Boom vertelt…

The origin and evolution of galaxies are closely linked to many different physical phenomena.

Op 23 juni 2020 verdedigde Santy Kouwagam haar proefschrift 'How lawyers win land conflicts for corporations: Legal Strategy and its influence on the Rule of Law in Indonesia'. Het promotieonderzoek is begeleid door promotoren prof.dr. A.W. Bedner en prof.dr. C.E. von Benda-Beckmann.

A convolutional neural network (CNN) is a biologically inspired algorithm, highly capable at processing images and videos.

Promotores: Prof.dr. H.S. Overkleeft, Prof.dr. G.A. van der Marel

Humans share meaning through language. Over time, repeated interactions have shaped languages into forms that match our cognitive preferences, making them structured, expressive, easy to learn, and ultimately, meaningful.

Promotores: Prof.dr. M. Franx, Prof.dr. M. Kriek (Univ. of California at Berkeley)

N-acylethanolamines (NAEs), including N-arachidonoylethanolamine (anandamide, AEA), N-palmitoylethanolamine (PEA) and N-oleoylethanolamine (OEA), are signaling lipids that play an important role in different physiological process.

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.

Historicus Jan Grabowski en socioloog Barbara Engelking houden op 26 november samen de Cleveringa-oratie. Zij schreven een kritisch boek over de Holocaust in Polen en werden daarvoor aangeklaagd.

Universitair docenten Bart van der Boom en Patrick Dassen maken kans op de Libris Geschiedenis Prijs 2022. Hun beider boeken staan op de shortlist.

Leids onderzoeker Ethan Mark heeft een missie, zo vertelt hij in alumnimagazine Leidraad. Hij wil dat we onze eurocentrische bril afzetten als we de Tweede Wereldoorlog bestuderen. Lang hebben we onszelf centraal gesteld. Na 75 jaar wordt het tijd om naar de verhalen van de rest van de wereld te lui…

Research

Students Practicing Citizen Journalism

In this Yearbook you will find some fascinating examples of what was done in 2021, not only by ourselves, but also by our international colleagues.

Op 15 augustus was de Nationale Herdenking waarbij men stilstaat bij het einde van de Tweede Wereldoorlog voor het Koninkrijk der Nederlanden. Emeritus hoogleraar Koloniale en postkoloniale geschiedenis Gert Oostindie verscheen in diverse media om over de herdenking te praten.

This research delves into a region of space known as the interstellar medium (ISM), which is essentially the area between the stars filled with gas and dust.

Bij de Onderzoeksgroep Geweld en Geweldpreventie (Violence and Violence Prevention) wordt onderzoek gedaan naar de complexiteit van hedendaags geweld, de uiteenlopende verschijningsvormen ervan en strategieën voor preventie.

Surface acoustic waves (SAWs) are mechanical waves that travel along the surface of a material and find many applications in modern technologies due to the ease of excitation on piezoelectric substrates via interdigital transducers (IDTs).

Plant exudates appeared long time ago in the history line of life in the early Devonian. They are typical saps produced by specialized cells.

Promotor: Jelle S. Kaastra Co-promotor: Jelle de Plaa

Over the last decades, aviation safety has improved strongly. As a downside, airline pilots do not have as many opportunities to develop through experience the competencies that they need in critical situations.

Solar energy is used by photosynthetic organisms to drive energy required cellular processes. Is absorbed by two groups of pigments, located in the LHCs.

The following report discusses a survey on the topic of the Sustainable Development Goals that was distributed among researchers at Leiden University in the month of November 2021.

In this thesis we study bistable reaction-diffusion equations on lattice domains.

Op 7 december 2021 verdedigde Georgina Kuipers het proefschrift 'Beschadigd vertrouwen'. Het promotieonderzoek is begeleid door prof.mr. W. den Ouden en prof.dr. M.A. van der Steen (EUR).

Promotor: Prof.dr. E Gittenberger, Co-Promotores: C.H.J.M. Fransen, B.W. Hoeksema

This dissertation presents new cryptographic protocols, which can be divided into two families.

The Standard Model (SM) of particle physics fails to explain several observed phenomena and is incomplete. In order to resolve this problem, one may extend the SM by adding new particles.

Plants and their pollinators form complex interaction networks. Within these networks, species differ widely in the number of species they interact with.

Until the 1990s, the only known planets were those in our Solar System. Three decades later, several thousand exoplanets have been discovered orbiting stars other than the Sun, and substantial efforts have been made to explore these strange new worlds through spectroscopic analyses of their atmosphe…

Promotores: P. Stevenhagen, E. Fouvry (Univeriste Paris Saclay)

This proposed research uses ego-documents from visual artists that were not intended for publication to reassess the scholarly debate on the demise of the Russian Avant-garde aesthetic in the twenties and early thirties of the 20th century.

Low-mass main-sequence stars like our Sun are continuous sources of outflowing hot magnetised plasma. In the case of the Sun, this is known as the solar wind, whereas for other stars they are called stellar winds.

There is concern about the threat that nanoplastics (NPs) may pose to both wildlife and humans. This thesis explores the mechanisms of toxicity of polystyrene nanoparticles (PS-NPs) in chicken embryo.

Promotor: Jaap Brouwer, Co-promotor: Remus Th. Dame

Marine sponges are important members of reef ecosystems, as they play ecological roles that are essential for the health of the reef.

Glycoside hydrolases (glycosidases/GHs) are widely abundant enzymes in all kingdoms of life and are important biocatalysts that catalyze the hydrolysis of glycosidic linkages in oligo/polysaccharides, glycoproteins and glycolipids with tremendous efficiency

Science is typically a patchwork of research contributions without much coordination. Especially in clinical trials, the follow-up studies that we do fail to be the most promising.

Promotores: G. Persoon, R. Schefold

Plants are colonized by an astounding number of microorganisms that can provide different life-support functions, including nutrient acquisition and protection against (a)biotic stresses like drought or pathogen attack.

Natural resources often stretch across borders that separate modern nation states. This can create conflict and limit opportunities for regulated consumption of their goods and services, but also provide opportunities for joint multinational efforts that exceed single country capabilities.

One of the main challenges in the development of an effective anti-cancer vaccine is the generation of an adequate and directed cellular immune response.

Streptomyces are bacteria abundant in soil that participate in diverse and complex interactions. These bacteria are the main producers of the antibiotics we currently use in the clinic.

Technologies that help to enhance our educational environments can be found everywhere.